Answer:
The theoretical probability of being dealt exactly two 2's in a 5-card hand from a standard 52-card deck is:
[tex]= \dfrac{2162}{32487}\\\\\approx 0.06655 \text{ in decimnal}[/tex]
Step-by-step explanation:
The problem can be solved by using the combinatorics formula. The number of ways of drawing a subset of r items from a population of n items is given by
[tex]^nC_r = \dfrac{n!}{r! (n-r)!}[/tex]
where n! is the factorial of n, r! the factorial of r and (n-r)! = factorial of (n-r)
The general formula for k! = k x (k - 1) x (k - 2) x ..... x 3 x 2 x 1
The number or ways in which you can get two 2's in a deal of 5 cards is given by
[tex]^5C_2 = \dfrac{5!}{ 2! (5 - 2)! } \\\\= = \dfrac{5!}{2! \times 3! }\\\\= 10[/tex]
Once we have been dealt 2 2's we have to compute how many ways we can get the remaining 3 cards. Since we are looking for exactly two 2's we cannot draw another 2
The number of cards left that we can draw the remaining three cards = 52(total cards) -2(two 2's already drawn) - 2(two 2's that cannot be drawn)
= 48 cards
We can draw 3 cards from 48 cards in [tex]^{48}C_3[/tex] ways
[tex]^{48}C_3 = \dfrac{48!}{ 3! (48 - 3)! }\\\\\\= \dfrac{48!}{3! \times 45! }\\\\= 17296[/tex]
Therefore the total number of ways of drawing exactly two 2's
= 10 x 17296 = 172960
The number of ways in which we can draw 5 cards from 52 cards is given by
[tex]^{52}C_5 = = \dfrac{52!}{5! (52 - 5)! }\\\\= \dfrac{52!}{5! \times 47! }\\\\= 2598960[/tex]
P(exactly two 2's in a 5-card hand)
[tex]= \dfrac{172960}{2598960}\\\\ \\= \dfrac{2162}{32487}\\\\[/tex]
or, in decimal
[tex]\approx 0.06655[/tex]
On her way to a concert, Hermione stopped at a restaurant for dinner. In her purse, she had 12 bills worth a total of $40. She had only $1 bills and $5 bills. How many $5 bills did Hermione have in her purse?
1
2
5
7
Let x be the number of $1 bills and y be the number of $5 bills that Hermione had in her purse. Then we can write two equations based on the given information:
x + y = 12 (because Hermione had 12 bills in total)
x + 5y = 40 (because the total value of the bills was $40)
We can solve this system of equations by first solving the first equation for x:
x = 12 - y
Substituting this expression for x into the second equation, we get:
(12 - y) + 5y = 40
Simplifying and solving for y, we get:
4y = 28
y = 7
Therefore, Hermione had 7 $5 bills in her purse. Answer: 7.
Suppose you apply the Euclidean algorithm to two positive integers a, b.You only know that a is a number with 1000 decimal digits. The value of b on the other hand isgiven:b=3.Then we can be certain that the Euclidean algorithm will end with a zero remainder in how manysteps?Enter the lowest number we can be certain of
This means that the algorithm will end after just one step, and the GCD will be equal to the last non-zero remainder, which in this case is 3. Therefore, we can be certain that the Euclidean algorithm will end with a zero remainder in one step, and the lowest number we can be certain of is 3.
In this particular question, the student is asking how many steps are required for the Euclidean algorithm to end with a zero remainder when applying it to two positive integers a and b.Suppose you apply the Euclidean algorithm to two positive integers a, b. You only know that a is a number with 1000 decimal digits. The value of b, on the other hand, is given as 3. We can be certain that the Euclidean algorithm will end with a zero remainder in one step.
In order to understand why this is the case, it is important to know that the Euclidean algorithm is a method for computing the greatest common divisor (GCD) of two positive integers. It is based on the observation that the GCD of two numbers does not change if the smaller number is subtracted from the larger number repeatedly.The Euclidean algorithm begins by dividing the larger number by the smaller number and taking the remainder.
The larger number is then replaced with the smaller number, and the smaller number is replaced with the remainder. This process is repeated until the remainder is zero. At this point, the algorithm ends, and the GCD is equal to the last non-zero remainder that was computed.In the case of the student's question, we know that b=3. Since 3 is relatively prime to any number, including a number with 1000 decimal digits, the remainder of the first step will always be 0.
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a commercial television advertising a pizza deal in which customers can choose two pizzas each with up to five toppings chosen from a set of 11 toppings. In the commercial, a boy claims that there are 1024^2 or 1,048,576 ways to choose the two pizzas. is this a valid claim?
please answers 1-6 I need this before 11:59 today
1. There are 4194304 ways to choose the two pizzas
2. Ways to make one pizza with up to five topping is 1023
3. There is only one way to build the two pizzas.
4. Combinations = 523,503
5. The total number of ways to make two pizzas are 523,504
6. The same value that the boy claims in the advertisement.
What is a probability?A subfield of statistics known as probability studies random events and their likelihood of happening.
1. There are 11 toppings and each topping can be either included or excluded from a pizza, there are 2 choices for each topping. Therefore, there are 2^11 = 2048 ways to make one pizza. For two pizzas, there are 2048*2048 = 4194304 ways to choose the two pizzas.
2. For one pizza with up to five toppings, we can use combinations to determine the number of ways to choose toppings. Since we have 11 toppings to choose from and can choose up to 5, the number of ways to choose is:
C(11, 1) + C(11, 2) + C(11, 3) + C(11, 4) + C(11, 5) = 11 + 55 + 165 + 330 + 462 = 1023
3. If the two pizzas are identical, there is only one way to build the two pizzas.
4. If the two pizzas are different, we need to choose 2 of the 1023 possibilities from problem 2. Since order doesn't matter, we use combinations, and the number of ways to choose is:
C(1023, 2) = 523,503
5. The total number of ways to make two pizzas with up to five toppings each is the sum of the answers from problems 3 and 4:
1 + 523,503 = 523,504
6. The number 10242 is equal to 1,048,576. This is the same value that the boy claims in the advertisement. Therefore, the boy's claim is valid only if the pizzas can have up to 11 toppings each, not up to 5 as advertised.
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A block of wood has a mass of 120g and a volume of 200cm3. What is the density of the wood?
Answer:
The density of the wood is 0.6 g/cm^3
Step-by-step explanation:
The density of an object can be calculated by dividing the mass of the object by its volume. In this case, the mass of the block of wood is 120g and its volume is 200cm^3.
Density = mass / volume
Density = 120g / 200cm^3
Density = 0.6 g/cm^3
Therefore, the density of the wood is 0.6 g/cm^3.
a continuous random variable x is normally distributed with a mean of 0 and a standard deviation of 1. the probability of an observation that lies within the range of -1.0 < x <1.0 is:
a continuous random variable x is normally distributed with a mean of 0 and a standard deviation of 1. the probability of an observation that lies within the range of -1.0 < x <1.0 is 0.6827.
The explanation for normal distribution is described by two parameters, the mean (μ) and the standard deviation (σ).
A continuous random variable X that is normally distributed has the probability density function, (X is a normally distributed variable):
f(x)=1σ√2π×e−12((x−μσ)2)
A normal distribution with a mean of 0 and standard deviation of 1 is called standard normal distribution or Z-distribution. The probability for the standard normal distribution can be found using the standard normal distribution table.
In this case, we have a continuous random variable x which is normally distributed with a mean of 0 and a standard deviation of 1. We are asked to find the probability of an observation that lies within the range of -1.0 < x < 1.0.
In other words, we want to find: P(-1.0 < x < 1.0)
To do this, we need to transform the interval (-1.0, 1.0) to a standard normal distribution as follows:
Z=(X−μ)/σ = (X−0)/1
= X
Next, we use a standard normal distribution table to find the probability for Z as follows:
P(-1.0 < x < 1.0) = P(-1 < Z < 1)
= P(Z < 1) - P(Z < -1)
From the standard normal distribution table,
We have P(Z < 1) = 0.8413 and
P(Z < -1) = 0.1587
Therefore: P(-1.0 < x < 1.0) = 0.8413 - 0.1587
= 0.6827
Thus, the probability of an observation that lies within the range of -1.0 < x < 1.0 is 0.6827.
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Assume that TDW Corporation (calendar year-end) has 2022 taxable income of $650,000 for purposes of computing the §179 expense. The company acquired the following assets during 2022: (Use MACRS Table 1, Table 2, Table 3, Table 4 and Table 5. ) Asset Placed in Service Basis Machinery September 12 $ 2,270,000 Computer equipment February 10 263,000 Furniture April 2 880,000 Total $ 3,413,000 a. What is the maximum amount of §179 expense TDW may deduct for 2022?
The maximum amount of §179 expense TDW may deduct for 2022 is $257,000.
To determine the maximum amount of §179 expense that TDW Corporation can deduct for 2022, we first Add up the cost of all the assets acquired in 2022:
$2,270,000 (machinery) + $263,000 (computer equipment) + $880,000 (furniture) = $3,413,000
Now we determine the amount of the §179 deduction limit for the tax year.
For tax year 2022, the §179 deduction limit is $1,050,000.
Check if the cost of the assets exceeds the §179 deduction limit.
Since the cost of the assets ($3,413,000) is greater than the §179 deduction limit ($1,050,000), we need to calculate the phase-out limit.
Now we determine the phase-out limit.
For tax year 2022, the phase-out limit is $2,620,000.
Calculate the §179 expense deduction.
Since the cost of the assets ($3,413,000) is greater than the phase-out limit ($2,620,000), we need to reduce the §179 deduction by the excess over the phase-out limit.
The excess over the phase-out limit is $793,000 ($3,413,000 - $2,620,000).
The §179 expense deduction is the lesser of the §179 deduction limit and the cost of the assets reduced by the excess over the phase-out limit.
The §179 expense deduction is $1,050,000 - $793,000 = $257,000.
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Solve the system of equations.
2x+2y+ 6z = 8
5x+6y + 5z = 3
5x + 6y + 3z = 5
a. (x= 34, y =
-27,z = -1)
b. (x= 33, y=-26, z = 0)
c.
d.
(x = 35, y = -28, z = -2)
(x= 36, y=-29, z = 1)
The solution of the system of equations:
2x+2y+ 6z = 8
5x+6y + 5z = 3
5x + 6y + 3z = 5
Is the one in option a.
(x= 34, y = -27,z = -1)
How to solve the system of equations?Here we have the system of equations:
2x+2y+ 6z = 8
5x+6y + 5z = 3
5x + 6y + 3z = 5
If we subtract the third equation from the second one we will get:
(5x + 6y + 5z) - (5x + 6y + 3z) = 3 - 5
5z - 3z = -2
We just removed two of the variables, so we can now solve this linear equation for z so we get:
2z = -2
z = -2/2
z = -1
We know that the value of z is -1, that is enough to identify the correct option because only one of these has z = -1 which is the first one, so that is the correct option.
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Please help I’ll give brainliest if u get the question right I’ll give u 100 points
45 of 50
Question 45 Review
Which balanced equation represents an endothermic reaction?
C(s) + 0₂ (8)→CO2₂ (8)
2 CH4 (8) +20₂ (8) 0₂ (8) + 2H₂O(4)
N₂ (8)+ 3H₂ (8)→ 2NH3 (8)
4. N₂ (8)+0₂ (8) 2NO(g)
1
3₂
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Answer:
The balanced equation that represents an endothermic reaction is:
2 CH4 (g) + 2 O2 (g) → 2 CO2 (g) + 2 H2O (g)
This is because the reactants (CH4 and O2) have a higher bond energy than the products (CO2 and H2O), meaning that energy must be absorbed in order to break the bonds and form the products. As a result, the reaction is endothermic.
8. A rectangular room is shown.
4x - 1
Tx
2
3x²+6.
A. (4x-1)-2x
B. (3x2+6) + (4x - 1) + x
C. (4-1)-(3x² + 6)
(3x²+6) + 2(4x-1) + 2x
-Door-
X-
4x-1
Port A: Which of the following expressions represents the perimeter of the room without the
door?
63x²+6)+(4x-1)x2+²x = (3x²+6) + 2(4x-1)+2x
Port B: What is the perimeter of the room without the door in simplest form? Show your
work.
The area of the room
without the door would be 14x+10 due to
simplifying at combining like terms of primeter: 2 (4x+1)+₂(3x+6)
I just need part b. But can someone make sure if part a and part b are correct?
Answer: 14x + 14
Step-by-step explanation: To find the perimeter of the room without the door, we need to add up the four sides. Using the simplified expression for the perimeter, which is 2(4x+1) + 2(3x+6), we can simplify further by distributing the 2:
2(4x+1) + 2(3x+6) = 8x + 2 + 6x + 12
Combining like terms, we get:
14x + 14
Therefore, the perimeter of the room without the door in simplest form is 14x+14.
Question 20
After months of negotiations, Jabu's annual salary was increased by 6. 35% to R330 000. Determine his
previous monthly salary and the monthly increase he will be getting.
Original salary of R20 955. 00, with an increase of R6 545. 00 per month.
[2] Original salary of R25 858. 02, with an increase of R1 641. 98 per month
(3) Original salary of R27500. 00, with an increase of R1 746. 25
per
month.
14] Original salary of R25 858. 02, with an increase of R1 746. 25 per month.
Jabu's Monthly salary is of R27500.00, with an increase of R1 746.25 per month. Jabu's monthly increase is R1 746.25. The correct answer is option 3.
To find Jabu's previous monthly salary, we can use the formula:
Previous monthly salary = (Annual salary / 12)
Since Jabu's new annual salary is R330 000, his previous annual salary would be:
Previous annual salary = (New annual salary / 1.0635) = (R330 000 / 1.0635) = R310 020.10
Therefore, Jabu's previous monthly salary would be:
Previous monthly salary = (Previous annual salary / 12) = (R310 020.10 / 12) = R25 835.01
To find the monthly increase, we can subtract Jabu's previous monthly salary from his new monthly salary:
Monthly increase = (New monthly salary - Previous monthly salary) = (R27 618.38 - R25 835.01) = R1 783.37
Therefore, Jabu's monthly increase is R1 746.25 (rounded to the nearest cent).
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What is the exact value of side x in the Trina for below? 20in 30 degree and X?
According to the question, the exact value of side x in the Trina are 34.641016151377546in.
What is value?Value is an intangible concept that refers to the worth of something, whether it is tangible or intangible. It is based on the perceived benefits and costs associated with the thing in question. Value can be subjective, as different people may place different worth on the same item. Value can also be objective, as there may be a set market price for a certain item.
The exact value of side x in the triangle can be determined by using the law of sines. The law of sines states that the ratio of the length of a side to the sine of its opposite angle is the same for all sides of a triangle.
Therefore, we can set up the following equation:
(20in/sin30°) = (x/sin60°)
Solving for x, we get:
x = 20in×(sin60°/sin30°)
x = 20in×(√(3)/1)
x = 20in×√(3)
x = 34.641016151377546in
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The exact value of side x in the Trina, according to the question, is 34.641016151377546in.
What is Exact value?Where you cannot predict the value, you must be specific. An exact number is a value that can be determined with absolute precision. Counted quantities of objects or sure unit conversions are examples of exact numbers.
The term "approximate number" refers to a number that is close to the precise number, and there is always a difference among exact and approximate numbers. For instance, are exact integers because no approximation is required.
As a result, we can construct the following equation:
(20in/sin30°) = (x/sin60°)
Solving for x, we get:
x = 20in×(sin60°/sin30°)
Simplify the above equation,
x = 20in×(√(3)/1)
x = 20in×√(3)
The value of x is,
x = 34.641016151377546in
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The complete question is,
What is the exact value of side x in the Trina for below? 20in 30 degree and X? Determine the exact value of side x.
Rami works at a carnival dart game where groups of people try to pop balloons taped to a wall by throwing darts. He records the number of people in each group and the total number of balloons they pop. This graph represents Rami’s data.
How many people were in the group that popped 10 balloons?
We can see that this corresponds to the point (4, 10). Therefore, there were 4 people in the group that popped 10 balloons.
Describe Correlation?Correlation refers to the relationship between two variables in a dataset. It is a statistical measure that quantifies the degree to which two variables are related to each other.
There are two types of correlation: positive and negative. Positive correlation exists when the two variables move in the same direction, meaning that as one variable increases, the other variable also increases. Negative correlation exists when the two variables move in opposite directions, meaning that as one variable increases, the other variable decreases.
The strength of the correlation can be measured using a correlation coefficient, which ranges from -1 to +1. A correlation coefficient of +1 indicates a perfect positive correlation, while a correlation coefficient of -1 indicates a perfect negative correlation. A correlation coefficient of 0 indicates no correlation between the two variables.
From the given graph, we can see that there is a positive correlation between the number of people in a group and the total number of balloons they pop. As the number of people in the group increases, the total number of balloons they pop also tends to increase.
We are asked to find the number of people in the group that popped 10 balloons. From the graph, we can see that this corresponds to the point (4, 10). Therefore, there were 4 people in the group that popped 10 balloons.
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Which of the following ordered pairs represents the point plotted and labeled A?
The x-axis starts at negative 4 with tick marks every unit up to positive 4. The y-axis starts at negative 4 with tick marks every unit up to positive 4. Point D is three units left of the origin. Point A is three units left and three units up from the origin. Point C is three units left and three units down from the origin. Point F is two units up from the origin. Point B is two units right and three units up from the origin. Point E is three units right and two units down from the origin.
(−3, −3)
(−3, 3)
(3, −3)
(3, 3)
Point A is three units left and three units up from the origin, so its coordinates are (-3, 3). Therefore, the correct answer is option 2) (-3, 3).
The topic of coordinate geometry involves the use of the Cartesian plane, also known as the coordinate plane or xy-plane, to graph and analyze relationships between points, lines, and shapes. The plane consists of two perpendicular number lines called the x-axis and the y-axis.
The origin, denoted by the point (0, 0), is the point where the two axes intersect. Points on the plane are represented by ordered pairs of numbers (x, y), where x is the distance from the y-axis and y is the distance from the x-axis. Lines on the plane can be represented by their slope and y-intercept, while shapes like circles, rectangles, and triangles can be graphed and analyzed using their respective formulas.
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Answer: (−3, −3)
Step-by-step explanation:
Jemma is tidying her garden. She starts tidying at
10:26am and finishes at
3pm. How much time did she spend tidying her garden?
Give your answer in minutes
Answer:270
Step-by-step explanation: 3pm + 12am = 15am
15 am - 10:26 pm = 4 hours 34 minutes
4 hours 34 minutes = 4x60 +30 mins = 270 mins
how is graphing (0, 2) different from graphing (2, 0)
Answer: graphing 0,2 would place the 0 on the x-axis and 2 on the y-axis, whereas graphing 2,0 would place the 2 on the x-axis and 0 on the y-axis
Step-by-step explanation:
Answer:
Step-by-step explanation:
Graphing the point (0, 2) means plotting a point at the coordinates where the x-axis is located at 0 and the y-axis is located at 2. This means that the point would be located at the upper part of the y-axis.
On the other hand, graphing the point (2, 0) means plotting a point where the x-axis is located at 2 and the y-axis is located at 0. This means that the point would be located on the x-axis to the right of the origin.
In general, the order of the coordinates in an (x, y) pair represents the horizontal and vertical position of the point, respectively. Thus switching the order of the coordinates changes the position of the point on the coordinate plane.
A shoe store has 3 types of shoes - sandals, sneakers, and dress shoes. The shoes come in 4 colors - black, brown, blue, and white. Customers can choose from 2 width options - wide width and narrow width. What is the total number of possible outcomes?
Use the fundamental counting principle
As per the fundamental counting principle, the total number of possible outcomes is 24.
To use the fundamental counting principle, we need to first identify the number of choices available for each option. In this case, we have 3 types of shoes, 4 colors, and 2 width options. So, the number of choices for each option is:
3 types of shoes
4 colors
2 width options
To determine the total number of possible outcomes, we multiply the number of choices for each option. This gives us:
Total number of possible outcomes = number of choices for type of shoe x number of choices for color x number of choices for width
= 3 x 4 x 2
= 24
Therefore, there are 24 possible shoe combinations that can be created from the given options.
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Frank organized a raffle. He sells 300 tickets for £5 each. The prizes cost £400. He gives 55% of the profit to Charity A and 45% of the profit to Charity B. Work out how much each charity receives.
Answer:
Step-by-step explanation:
The total revenue from selling 300 tickets for £5 each is:
300 x £5 = £1500
The profit will be the difference between the total revenue and the cost of prizes:
£1500 - £400 = £1100
The amount of profit that goes to Charity A is:
55% x £1100 = £605
The amount of profit that goes to Charity B is:
45% x £1100 = £495
Therefore, Charity A receives £605 and Charity B receives £495.
50 POINTS PLEASE HELP
IN YOUR OWN WORDS PLEASE:)
The purpose of filling out a W-4 is to make it easier for individuals to meet their tax liability by
paying income taxes as they earn income. Paying anticipated taxes from each paycheck
reduces the amount an individual owes when filing taxes and can even result in a tax refund.
To guarantee or increase the refund, individuals sometimes claim fewer allowances (to have
more income tax withheld) or request a specific additional amount to be withheld from each
paycheck.
Daniel's employer will automatically deduct taxes from Daniel's pay using the information on
the W-4 form that Daniel completed on his first day. From his W-4 form, Daniel's employer
determined that $75 needs to be withheld from each of Daniel's weekly paychecks, totaling
$3,900 for the year.
Compare Daniel's tax liability from part B, question 3, with the total amount withheld from his
check: $3,900 for the year. If Daniel wants a refund when he files his taxes, should he have
filled out his W-4 differently? Explain your reasoning.
Answer:
To determine if Daniel should have filled out his W-4 form differently to receive a refund, we need to compare his tax liability with the total amount withheld from his paychecks for the year.
If Daniel's tax liability for the year is less than $3,900, he will receive a refund when he files his taxes. If his tax liability is more than $3,900, he will owe additional taxes when he files his taxes.
If Daniel's tax liability is exactly $3,900, he will neither owe additional taxes nor receive a refund when he files his taxes.
Therefore, to determine if Daniel should have filled out his W-4 form differently, we need to compare his tax liability with $3,900.
If Daniel's tax liability from part B, question 3, is less than $3,900, he will receive a refund when he files his taxes, as the total amount withheld from his paychecks is more than his tax liability. In this case, Daniel may want to consider filling out his W-4 form differently to reduce the amount withheld from his paychecks and increase his take-home pay.
On the other hand, if Daniel's tax liability from part B, question 3, is more than $3,900, he will owe additional taxes when he files his taxes, as the total amount withheld from his paychecks is less than his tax liability. In this case, Daniel may want to consider filling out his W-4 form differently to increase the amount withheld from his paychecks and reduce the amount he will owe when he files his taxes.
If Daniel's tax liability from part B, question 3, is exactly $3,900, he will neither owe additional taxes nor receive a refund when he files his taxes, and his W-4 form is correctly filled out for his tax situation.
In summary, whether or not Daniel should have filled out his W-4 form differently to receive a refund depends on his tax liability compared to the total amount withheld from his paychecks. If his tax liability is less than the total amount withheld, he may want to reduce the amount withheld to increase his take-home pay. If his tax liability is more than the total amount withheld, he may want to increase the amount withheld to reduce the amount he will owe when he files his taxes. If his tax liability is exactly equal to the total amount withheld, his W-4 form is correctly filled out for his tax situation.
m ∠ 1 = ( 7 x − 21 ) ° and m ∠ 2 = ( − 5 x + 75 ) ° , what is m ∠ 1 ?
The measure of ∠1 is 117° before that we have to find out the angle of x, the values are in degrees.
What is an angle?An angle is the geometric measure of the space between two intersecting lines or planes, usually expressed in degrees, radians, or other units of measurement.
Since the sum of the measures of angles in a triangle is 180°,
m∠1 + m∠2 + m∠3 = 180°
putting the given values:
(7x - 21)° + (-5x + 75)° + m∠3 = 180°
Simplifying the above equation,
2x + 54° + m∠3 = 180°
Subtracting 54° from both sides, we get:
2x + m∠3 = 126°
We know that ∠3 is a right angle, which means its measure is 90°. Substituting this value, we get:
2x + 90° = 126°
Subtracting 90° from both sides, we get:
2x = 36°
Dividing both sides by 2, we get:
x = 18°
Now that we know the value of x, we can substitute it into the expression for m∠1:
m∠1 = (7x - 21)° = (7 x 18 - 21)° = 117°
Therefore, the measure of ∠1 is 117°.
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The measure of angle 1, we need to use the given equation that relates angle 1 to variable x. The equation is
[tex] m ∠ 1 = ( 7 x − 21 ) °[/tex].
the measure of angle 1 is 35 degrees.
This means that the measure of angle 1 is equal to 7 times the value of x minus 21 degrees.
However, we are not given the value of x directly. Instead, we are given the measure of angle 2 in terms of x. The equation for angle 2 is
[tex] m ∠ 2 = ( − 5 x + 75 ) °[/tex].
This means that the measure of angle 2 is equal to negative 5 times the value of x plus 75 degrees.
We can set these two equations equal to each other because angle 1 and angle 2 are vertical angles and therefore congruent. This gives us the equation:
[tex]7x - 21 = -5x + 75[/tex]
We can simplify this equation by adding 5x to both sides:
[tex]12x - 21 = 75[/tex]
Then, we add 21 to both sides:
[tex]12x = 96[/tex]
Finally, we divide both sides by 12:
[tex]x = 8[/tex]
Now that we have found the value of x, we can plug it into the equation for angle 1 to find its measure:
[tex]m ∠ 1 = (7 * 8) - 21[/tex]
[tex]m ∠ 1 = 56 - 21[/tex]
[tex]m ∠ 1 = 35 degrees[/tex]
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an old piano has 88 keys, and 56 of them are out of tune, while the remaining keys are tuned properly. a child strikes a key on the piano at random. what is the probability that the child strikes a properly tuned key?
Answer: I think It is 63.64%. If I'm wrong I'm sorry.
Step-by-step explanation:
Ask yourself what is 56% out of 88%. I did it in my head, but I got 63.6363636% then I rounded it to 63.64%.
the coefficient of correlation is a useful measure of the linear relationship between two variables. true false
The statement is true.
The coefficient of correlation, also known as the Pearson correlation coefficient, is a measure of the strength and direction of the linear relationship between two variables. It ranges from -1 to 1, with a value of -1 indicating a perfect negative correlation, a value of 0 indicating no correlation, and a value of 1 indicating a perfect positive correlation.
The coefficient of correlation is useful in many applications, including research, business, and finance. It allows us to quantify how closely related two variables are, which is important when analyzing data and making predictions.
For example, in finance, the correlation coefficient can be used to measure the degree of correlation between the returns of two assets, which is important when building diversified portfolios. It is important to note, however, that the coefficient of correlation only measures the strength and direction of the linear relationship between two variables.
It does not indicate causation, nor does it capture any non-linear relationships that may exist between the variables. Therefore, it should be used in conjunction with other analytical tools to fully understand the nature of the relationship between the variables.
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a run test is conducted for a process. the z-test value is calculated to be -1.5. if the run test acceptable limits are /- 2sigma you would conclude?
The conclusion of the test is the calculated z-test value of -1.5 falls within the acceptable limits of +/- 2 sigma.
To interpret the results of the run test, we need to compare the calculated z-test value with the acceptable limits for the test. The acceptable limits for the run test are +/- 2 sigma, which means that the process is considered acceptable if the z-test value falls within this range.
Since the z-value of -1.5 falls within the acceptable limits of +/- 2 sigma, we can conclude that the process is acceptable according to the run test. This means that there is no evidence of non-randomness or nonconformity in the process, and the process is functioning as expected.
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Bob buys a new mattress that costs $820. Bob pays $380
right away. For the remaining cost, Bob will pay $44 each
month. How many months will Bob pay $44 until the
mattress is completely paid for?
Answer:
Step-by-step explanation:
820-380=440
440:44=10
10!
Answer:
10 months
Step-by-step explanation:
820-380=440then divuse the cost 44 so 440/44 to get 10 months
Use the multiplication method to increase £88 by 14%
To increase £88 by 14%, we can use the multiplication method, which involves multiplying the original amount by the decimal equivalent of the percentage increase.
The multiplication method is a mathematical technique used to solve problems involving multiplication. It involves breaking down numbers into their constituent parts and then multiplying those parts together to arrive at the final answer.
To find the decimal equivalent of 14%, we divide the percentage by 100:
14% ÷ 100 = 0.14
This tells us that a 14% increase is equivalent to multiplying the original amount by 1.14 (1 + 0.14).
To increase £88 by 14%, we can multiply it by 1.14:
£88 x 1.14 = £100.32
Therefore, the increased amount is £100.32.
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Is r=4q-5 a linear function ?
Answer:
yes
Step-by-step explanation:
replace r and q with y and x:
y = 4x - 5
It is a line.
Find the area of the shaded region formed by the points ABDC
inside circle sector OAB with center O.
75°
6cm D 4cm
7.11 [tex]cm^{2}[/tex] is the area of the darkened area, or 57 - (5/12). (rounded to two decimal places)
what is circle ?A circle in geometry is a closed object made up of all points in a plane that are equally spaced out from a specific point known as the centre. The diameter of a circle is the distance through its centre; the radius is the distance from any point on the circle to that point. Any three locations that are located on a circle can be used to describe it, in addition to its centre point and radius. A circle's circumference, also known as its perimeter, can be calculated using the formula C = 2r, where r denotes the radius and is a mathematical constant roughly equivalent to 3.14. The equation A = r2 determines the area of a circle.
given
We must deduct the area of triangle OAB (the sector) from the area of trapezium ABCD in order to determine the area of the shaded zone formed by points ABDC inside circle sector OAB.
Finding the sector's area is the first step. The sector's central angle is 75 degrees, or (75/360) of the complete circle. Hence, this is the sector's geographic scope:
(75/360)r2, where r is the circle's radius.
Inputting r=4cm results in:
(75/360)π(4)² = (5/12)π cm²
The area of the trapezium must then be located. Finding the height of the trapezium, which is the separation between lines AB and CD, is necessary to do this.
Using the Pythagorean Theorem, the following can be discovered:
h² = (OA)² - (CA) (CA) ²
h² = 4² - 3²
h = √7 cm
The trapezoid's surface area is:
(1/2)(AB+CD)
h = (1/2)(6+4)
(√7) = 5√7 cm²
Lastly, we can calculate the area of the darkened area by deducting the sector's area from the trapezoid's area:
7.11 [tex]cm^{2}[/tex] is the area of the darkened area, or 57 - (5/12). (rounded to two decimal places) .
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The base of the parallelogram has a length
of 10 cm. What is the height?
10cm
12 cm
14 cm
The height is either 10 cm,12 cm,14 cm.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The base of the parallelogram has a length of 10 cm.
Here, area is not given so the height may be anything.
suppose h = 10
Hence, We get;
Area = base * height
= 10 * 10
= 100 cm²
if h = 12
area = 10 * 12
= 120 cm²
if h = 14
area = 10 * 14
= 140 cm²
Therefore, the height is either 10 cm,12 cm,14 cm.
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How many multiples of 2 are there between 176 and 389
There are 107 multiples of 2 between 176 and 389.
The first multiple of 2 within the range is the smallest multiple of 2 that is greater than or equal to the lower endpoint, which is 176. To find this, we divide 176 by 2:
176 ÷ 2 = 88
So the first multiple of 2 within the range is 88.
The last multiple of 2 within the range is the largest multiple of 2 that is less than or equal to the upper endpoint, which is 389. To find this, we divide 389 by 2:
389 ÷ 2 = 194.5
Since we are only interested in whole numbers, we round 194.5 down to the nearest integer, which is 194.
So the last multiple of 2 within the range is 194.
Now that we know the first and last multiples of 2 within the range, we can count how many multiples of 2 exist between them. To do this, we subtract the first multiple from the last multiple and add 1:
194 - 88 + 1 = 107
Therefore, there are 107 multiples of 2 between 176 and 389.
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in exercise physiology, a person's maximum heart rate, in beats per minute, is found by subtracting his age in years from 220. so, if a represents your age in years, then your maximum heart rate is:
Step-by-step explanation:
If your age is ' a ' then your max heart rate = 220 - a