Answer:
Correct options are A, B, E--------------------------
Standard form for the equation of a circle is:
(x − h)² + (y − k)² = r², where (h, k) is the center and r is the radiusConvert the given equation into standard form:
x² + y² - 2x - 8 = 0x² - 2x + 1 + y² - 9 = 0(x - 1)² + y² = 9(x - 1)² + y² = 3²Its center is ( 1, 0) and radius is r = 3.
Let's verify the statements:
A) The radius of the circle is 3 units - TRUE, r = 3;B) The center of the circle lies on the x-axis - TRUE, point (1, 0) is on the x-axis;C) The center of the circle lies on the y-axis - FALSE, the x- coordinate of the center is not zero; D) The standard form of the equation is (x – 1)² + y² = 3 - FALSE, r²= 9 but not 3;E) The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9, TRUE, its radius is r² = 9 ⇒ r = 3.Answer:
See below
Step-by-step explanation:
To find:-
Which statements are true .Answer:-
The given equation of the circle is ,
[tex]\longrightarrow x^2+y^2-2x-8 = 0 \\[/tex]
For finding the correct statements , we need to convert this equation into standard form for a circle.
The standard equation of circle is given by,
[tex]\boxed{\begin{tabular}{c}\textbf{\underline{ \red{Standard\ equation\ of \ circle }}} \\ \\ \text{ The standard equation of a circle is given by:-} \\\\ \longrightarrow \underline{\underline{ (x-h)^2+(y-k)^2 = r {}^{2}}} \\\\ \text{where} , \\\\ \bullet\text{ (h,k) is the centre of the circle.}\\\\\bullet\text{ "r" is the radius of the circle. }\\\end{tabular}}[/tex]
Now for that we need to complete the square for "x" . This can be done by ,
Rearrange the terms,
[tex]\longrightarrow x^2-2x + y^2-8 = 0 \\[/tex]
Add and subtract 1² .
[tex]\longrightarrow ( x^2 -2x +1^2 ) - 1^2 + y^2-8=0 \\[/tex]
Simplify,
[tex]\longrightarrow (x^2-2(1)x+1^2) - 1-8 + y^2=0 \\[/tex]
Notice that the terms inside the small brackets are in the form of a² - 2ab + b² , which is the whole square of (a-b) . So we can write it as,
[tex]\longrightarrow (x-1)^2 +y^2 - 9 = 0 \\[/tex]
Add 9 on both the sides ,
[tex]\longrightarrow (x-1)^2 + y^2 = 9\\[/tex]
This can be written as,
[tex]\longrightarrow \underline{\underline{ \boldsymbol{(x-1)^2+(y-0)^2 = 3^2}}} \\[/tex]
On comparing it to the standard form, we have;
[tex]\longrightarrow\boxed{ \text{Center = (1,0) }} \\[/tex]
[tex]\longrightarrow\boxed{ \text{ Radius = 3 \ units}} \\[/tex]
Let's check the given statements ,
Statement 1: The radius of the circle is 3 units.
This statement is true as we just calculated the radius to be 3 units.Statement 2: The centre of the circle lies on the x-axis.
This statement is also true as you can see that the y coordinate to the centre is 0 , and the x coordinate is 1 , so it will be on x-axis .Statement 3: The statement of the circle lies on the y-axis.
This statement is false since in the previous statement we proved that the centre lies on the x-axis .Statement 4: The standard equation of the circle is (x-1)²+y² = 3
This statement is false as we calculated the value of r² to be 9 .Statement 5: The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
The given equation of circle is x² + y² = 9 , if we convert this into standard form, we will get ; x² + y² = 3² . Now on comparing it to the standard equation, we see that the radius is 3 units . Hence the given statement is also true .The graph for the same has been attached.
What is the solution to the inequality h (t) > 9?
The answer of the given question is the solution to the inequality h(t) > 9 is any value of t that makes h(t) greater than 9.
What is Inequality?An inequality is a mathematical statement that shows a relationship between two values or expressions that are not equal. It uses symbols such as < (less than), > (greater than), ≤ (less than or equal to), or ≥ (greater than or equal to) to express the relationship between the two values. Inequalities are often used in algebra, geometry, calculus, and other areas of mathematics to represent constraints or limits on values or to compare two different sets of values. For example, an inequality might be used to determine if a certain number falls within a certain range, or to find the maximum or minimum value of a function given certain constraints.
The solution to the inequality h(t) > 9 is any value of t that makes h(t) greater than 9.
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The Pythagorean Theorem - Quiz - Level H
Question 6
What is the length of the diagonal of the rectangle?
Using the Pythagorean theorem we know that the length of the given diagonal is 21.25 units respectively.
What is the Pythagorean Theorem?The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a fundamental Euclidean geometry relationship between the three sides of a right triangle.
This statement states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.
If a²+b²=c² and c is the triangle's longest side, the triangle is a right triangle.
If a triangle is not a right triangle, there are two additional types that can exist.
So, the formula is:
a² + b² = c²
Now, insert values as follows:
12.75² + 17² = c²
162.5625 + 289 = c²
451.5625 = c²
√451.5625 = c
21.25 = c
Therefore, using the Pythagorean theorem we know that the length of the given diagonal is 21.25 units respectively.
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How many face edges and verties in cube
5p+10q = 10; 2p-q= 1
Answer:
Step-by-step explanation:
5p+10 equals big 5
Answer:
p = 0.8; q = 0,6
Step-by-step explanation:
5p + 10q = 10
2p - q = 1
5p + 10q = 10
q = 2p - 1
5p + 10 ( 2p - 1 ) = 10
5p + 20p - 10 = 10
25p = 20
p = 0,8
q = 2 x 0,8 - 1
q = 0,6
What is the value of x? Enter your answer in the box.
Answer: 54°
Step-by-step explanation: As the sum of all angles in a Pentagon is 540°
so value of X is 540° - 456 = 54°
3
Ten children played arcade games. The table shows the amount of time each child played and the number of tokens each child used in that time.
Child Child Child Child Child Child Child Child Child Child
1
2
3
4
5
6
7
8
9
10
Time
Played
(minutes)
Tokens
Used
1
5
3
5
S 15
12 1 24
S
18
එය
20
1
30
15
35
39
35 S
The correlation coefficient is 0.363 for these data.
Which statement is the best interpretation of the correlation coefficient?
There is a strong negative association between the number of minutes played and the number of tokens used.
There is a weak negative association between the number of minutes played and the number of tokens used.
There is a strong positive association between the number of minutes played and the number of tokens used.
There is a weak positive association between the number of minutes played and the number of tokens used.
The best interpretation of the correlation coefficient is:
There is a weak positive association between the number of minutes played and the number of tokens used.
What is the correlation coefficient?
A correlation coefficient is a number between -1 and 1 that tells you the strength and direction of a relationship between variables.
The correlation coefficient is 0.363 for these data. Since the correlation coefficient is positive,
we know that there is a positive association between the number of minutes played and the number of tokens used.
However, since the correlation coefficient is less than 0.5, we can conclude that the association is weak.
Therefore, the best interpretation of the correlation coefficient is:
There is a weak positive association between the number of minutes played and the number of tokens used.
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Hey- can someone help me with theese 2 questions- i did them yestr and it said that they were wrong?
Answer: 1) C. 1.75
2) C. 5.25
Step-by-step explanation:
For this first question, the answer is C. 1 3/4
First, you will need to calculate how many hours the 3/4-hour students studied versus the 1/4-hour students.
3/4 students: 3/4 · 3 = 9/4
1/4 students: 1/4 · 2 = 2/4
9/4 - 2/4 = 7/4 = 1 3/4
Therefore, your answer for the first question is C.
For the second question, the answer is C
We must calculate how many hours each group of students studied, then add them together. You can add or multiply in this situation.
1/4 students: 1/4 · 2 = 2/4 (No need for simplifying until the end.)
1/2 students: 1/2 · 5 = 5/2
3/4 students: 3/4 · 3 = 9/4
Now, let's change the 5/2 so we can add it to the other fractions.
5/2 ·2 = 10/4
Let's add.
2/4 + 10/4 + 9/4 = 21/4
Simplify.
21/4 = 5 1/4.
Therefore, answer choice C is correct.
Hope this helped!
HELP PLEASEEEEE!!! BEST ANSWER WILL GET BRAINLIEST
Step-by-step explanation:
There are SIX sides 3 pairs of equivalent sides
2 * ( 1 1/3 x 3 + 3 * 2 2/3 + 2 2/3 * 1 1/3 ) = 31 1/9 square yards
Sally Brown bought a house with a 10% adjustable rate mortgage for 20 years. She was paying $9.66 monthly per thousand on her original loan. At the end of 4 years she owes the bank $55,000.00. Interest has now gone up to 12%, the bank can renew the mortgage at this rate or Sally can pay the full $55,000.00. Sally renews the mortgage and will pay $11.02 monthly per thousand on this loan.
What is the amount of the old and new monthly payment? What is the percent of increase in her new monthly payment (to the nearest tenth)?
old payment = $
new payment = $
% increase
The old payment is $96.60, and the new payment is $110.20. The percent increase in her new monthly payment is 14.1%.
To calculate the old payment, we multiply the original loan amount by the monthly payment per thousand, which gives us $9.66 x 55 = $531.30.
To calculate the new payment, we divide the renewed loan amount by 1000 and multiply it by the monthly payment per thousand, which gives us $11.02 x 55 = $606.10.
To calculate the percent increase, we use the formula: ((new payment - old payment) / old payment) x 100. Substituting the values, we get ((606.10 - 531.30) / 531.30) x 100 = 14.1%. Therefore, the percent increase in her new monthly payment is 14.1%.
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what value of x would prove these lines parallel
O 22
O 16
O -0.5
O 40
16. (03.02 MC)
If f(x) = 2x² + 4, find f(3). (1 point)
Answer:
22
Step-by-step explanation:
f(x) = 2x² + 4 f(3)
f(3) = 2(3)² + 4
f(3) = 2(9) + 4
f(3) = 18 + 4
f(3) = 22
the time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes. the probability is 90% that it will take at least how long to assemble a component?
For the probability of 90% that it will take at least 68.195 minutes long to assemble an electronic component.
As we have the time it takes to assemble an electronic component is normally distributed.
Mean time, [tex] \mu[/tex] = 17.2 minutes
Standard deviations, [tex] \sigma[/tex]
= 3.1 minutes
We have to determine probability is 90% that it will take at least how long to assemble a component. Now, from the standard normal distribution table value of Z - score for 90% is equals to the 1.645.
Using the Z- score formula in normal distribution, [tex]Z = \frac{ X - \mu}{\sigma }[/tex]
=> 1.645 = ( X - 17.2 )/3.1
=> X - 17.2 = 31 × 1.645
=> X = 17.2 + 50.995
=> X = 68.195
Hence, the required at least the long to assemble a component is equals to the 68.195.
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simplify: [2]
(−3d'2e'4)'3
_________
9d'2e'5
" ' " is used for square..
Answer:
[tex]81 {d}^{4} {e}^{7} [/tex]
Step-by-step explanation:
Use properties of degrees:
1. When multiplying different degrees on one term, the degree indicators must be multiplied, for example:
[tex]( { {x}^{2}) }^{3} = {x}^{2 \times 3} = {x}^{6} [/tex]
2. When dividing like terms (with the same base) with different degrees, the degree indicators must be subtracted, for example:
[tex] \frac{ {x}^{5} }{ {x}^{2} } = {x}^{5 - 2} = {x}^{3} [/tex]
3. When squaring a negative term in parentheses, the minus is eliminated, for example:
[tex]( { - 3x})^{2} = 9 {x}^{2} [/tex]
.
[tex] \frac{ {(( { - 3d})^{2} \times {e}^{4} )}^{3} }{ {9d}^{2} \times {e}^{5} } = \frac{729 {d}^{6} \times {e}^{12} }{9 {d}^{2} \times {e}^{5} } = 81 {d}^{4} \times {e}^{7} [/tex]
A triangle has side lengths 1 units, 1 units, and x units. Determine the range in which x must lie in order for a triangle to exist.
Responses
A -1 < x < 2-1 < x < 2
B 1 < x < 21 < x < 2
C 0 < x < 20 < x < 2
D 0 < x < 1
The range in which x must lie in order for a triangle to exist is: 0 < x < 2.
The correct option is (D). 0 < x < 1.
A triangle has side lengths of 1 units, 1 units, and x units.
Determine the range in which x must lie in order for a triangle to exist.
Triangle is the type of polygon that is formed when three line segments join.
A triangle can be formed when and only when the sum of any two sides is greater than the third side.
Using the triangle inequality theorem we know that,1 + 1 > x1 + x > 11 + x > 1x > 0
Now combining both results:
x > 0
Therefore, the range in which x must lie in order for a triangle to exist is: 0 < x < 2.The correct option is (D). 0 < x < 1.
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Sarah launches a snowball at
a rate of 16 feet per second
from a hill that is 32 feet off
the ground.
When does the
snowball hit the
ground?
What is the maximum
height the snowball
reaches?
Step-by-step explanation:
We can use the kinematic equations of motion to solve this problem. Let's assume the initial velocity of the snowball is 16 feet per second and its initial height is 32 feet. Also, we know that the acceleration due to gravity is -32.2 feet per second squared (assuming downward direction as negative).
To find out when the snowball hits the ground, we can use the equation:
h = 32 + 16t - 16t^2
where h is the height of the snowball at time t. We want to find the value of t when h = 0 (since the snowball hits the ground at that point). Therefore, we can rewrite the equation as:
16t^2 - 16t - 32 = 0
Dividing both sides by 16, we get:
t^2 - t - 2 = 0
Solving for t using the quadratic formula, we get:
t = (1 ± √(1 + 8))/2
t = 2 seconds or -1 second
Since time cannot be negative, the snowball hits the ground after 2 seconds.
To find the maximum height the snowball reaches, we can use the fact that the maximum height occurs at the vertex of the parabolic trajectory. The x-coordinate of the vertex is given by:
t = -b/2a
where a and b are the coefficients of the quadratic equation. In this case, a = 16 and b = -16, so:
t = -(-16)/(2*16) = 0.5 seconds
To find the corresponding height, we can substitute t = 0.5 seconds into the equation for h:
h = 32 + 16(0.5) - 16(0.5)^2
h = 36 feet
Therefore, the maximum height the snowball reaches is 36 feet.
A soccer player is going to kick a soccer ball from one corner of a field to the opposite corner. If the field is 80 yards long and 60 yards wide, how far will the soccer player have to kick the ball?
Answer: Assuming the field is rectangular, the distance between the two corners diagonally can be calculated using the Pythagorean theorem, which states that the square of the length of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
In this case, the length and width of the field form the two sides of the right triangle, and the diagonal is the hypotenuse.
So, using the Pythagorean theorem:
Diagonal^2 = Length^2 + Width^2
Diagonal^2 = 80^2 + 60^2
Diagonal^2 = 6400 + 3600
Diagonal^2 = 10000
Diagonal = √10000
Diagonal = 100 yards
Therefore, the soccer player will have to kick the ball 100 yards to reach the opposite corner of the field.
Step-by-step explanation:
You pick a card at random. 4 5 6 7 What is P(not odd)? Write your answer as a percentage.
Answer:
50%
Step-by-step explanation:
There are 4 cards. 4 and 6 are not odd, which is 2 cards.
P(not odd) = number of cards that are not odd/ total number of cards
= 2/4 = 1/2 = .5 = 50%
Sin(cos^-1[x+1])
Help out solve this math problem
Answer:
sin(cos⁻¹(x+1)) = √(1 - (x+1)²)
Step-by-step explanation:
A table of values is shown.
X
0
1
2
3
4
Y
y =
-2
-10
-50
- 250
- 1250
Write the equation for the function shown in the table
by typing values in the blank spaces.
)x
The function is an exponential function of the form y = a * b^x, where "a" is the initial value and "b" is the common ratio.
Using the given table, we can see that:
- The initial value is y(0) = -2, so a = -2.
- To find the common ratio, we can divide any term by the previous term. For example:
- b = y(1)/y(0) = (-10)/(-2) = 5
- b = y(2)/y(1) = (-50)/(-10) = 5
- and so on.
Since we get the same value of b for all the ratios, we can conclude that the common ratio is b = 5.
Therefore, the equation for the function shown in the table is: y = -2 * 5^x.
Members of a basketball team are painting
a design on the floor of the basketball
court. The special paint they are buying
costs $15.80 a pint. One pint of this paint
covers ten square feet of surface.
Answer:
158
Step-by-step explanation:
help asap asignment closes soon!!!
Answer:40
Step-by-step explanation:
90= 2x-10
Answer:
40°
Step-by-step explanation:
Measure of angle LOM(aka x) is equal to:
x+x+10 = 90
2x = 80
x = 40°
suppose you add 1 identical room to a pair of houses. the two houses are identical except for square footage. how much does lprice increase for a house with 4000 sqft compared to a house with 1000 sqft?
When adding one identical room to a pair of houses, the price increase for a house with 4000 sqft compared to a house with 1000 sqft is $150,000.
What is the basis of this problem?
We have two houses, one with a 4000 square foot floor plan and another with a 1000 square foot floor plan. Both of them are identical, and each of them is expected to receive an additional identical room. We must determine how much the price of the house with the 4000 square foot floor plan will increase compared to the house with the 1000 square foot floor plan when both of these are completed.
Let's start by identifying the amount of money needed to construct each house. The amount of money needed to construct the house with the 4000 square foot floor plan is $300,000, and the amount of money required to build the house with the 1000 square foot floor plan is $150,000.The cost of building per square foot in this case is therefore $75/sqft.
As a result, the price for a 4000 sqft house is: $75/sqft × 4000 sqft = $300,000On the other hand, the cost of constructing a 1000 sqft house is:$75/sqft × 1000 sqft = $75,000When each house gets an additional identical room, the increase in the cost of the room is $50,000. As a result, the price of the house with the 4000 square foot floor plan will increase by 4 times, or $200,000, whereas the price of the house with the 1000 square foot floor plan will increase by one, or $50,000. As a result, the price of a 4000 sqft house will be $300,000 + $200,000 = $500,000, whereas the price of a 1000 sqft house will be $150,000 + $50,000 = $200,000.
When we compare these two values, we obtain the following outcome: Suppose you add 1 identical room to a pair of houses. The two houses are identical except for square footage.
When we compare the two values, we get the following result: $500,000 - $200,000 = $300,000
Therefore, the price increase for a house with 4000 sqft compared to a house with 1000 sqft is $150,000.
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On January 1, 2015, Jose Company purchased a building for $200,000 and a delivery truck for $20,000. The following expenditures have been incurred during 2017:
The capitalized costs for 2017 is $55,000.
Capitalizing means adding the cost of an asset to its book value or cost basis. Not all costs can be capitalized.
Generally, only costs that increase an asset's useful life or productive capacity should be capitalized.
In this case, the building and truck were purchased in 2015 and have been capitalized.
The following costs incurred in 2017 should be analyzed to determine whether they should be capitalized or expensed:
Painting the building for $5,000 - This cost does not increase the useful life or productive capacity of the building.
It is considered a repair and maintenance expense and should be expensed.
Installing new windows in the building for $10,000 - This cost improves the building's insulation and prevents leaking.
It is considered a capital improvement that extends the useful life of the building. Therefore, it should be capitalized.
Installing a new conveyor system for $40,000 - This cost increases the productive capacity of the company's operations. It is considered a capital expenditure and should be capitalized.
Repainting the delivery truck for $1,000 - This cost does not increase the useful life or productive capacity of the truck. It is considered a repair and maintenance expense and should be expensed.
Installing a hydraulic lift system on the truck for $5,000 - This cost allows better handling of large loads and increases the productive capacity of the truck. It is considered a capital expenditure and should be capitalized.
Overhauling the truck's engine for $4,000 - This cost is a repair and maintenance expense and should be expensed.
Therefore, the capitalized costs for 2017 are
$10,000 (new windows in the building) + $40,000 (new conveyor system) + $5,000 (hydraulic lift system on the truck) = $55,000.
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Question:
On January 1, 2015, Jose Company purchased a building for $200,000 and a delivery truck for $20,000. The following expenditures have been incurred during 2017: • The building was painted at a cost of $5,000. To prevent leaking, new windows were installed in the building at a cost of $10,000. • To improve production, a new conveyor system was installed at a cost of $40,000. • The delivery truck was repainted with a new company logo at a cost of $1,000. • To allow better handling of large loads, a hydraulic lift system was installed on the truck at a cost of $5,000. • The truck's engine was overhauled at a cost of $4,000. Required: 1. Determine which of those costs should be capitalized. Assume that all costs were incurred on January 1, 2017.
Angle b has a measure between 0° and 360° and is coterminal with a â€""865° angle. what is the measure of angle b? 110° 115° 210° 215°
An angle that is coterminal with -865° and has a measure between 0° and 360° is 75°. Since Angle b is coterminal with this angle, we can conclude that the measure of Angle b is 75°.
We must locate an angle that is coterminal with the -865° angle and has a measure between 0° and 360° in order to determine the size of angle b.
To do this, we can add or remove 360-degree multiples until we have an angle that is coterminal with -865° and is between 0° and 360°.
-865° + 360° = -505° (not between 0° and 360°)
-865° + 2(360°) = -145° (not between 0° and 360°)
-865° + 3(360°) = 75° (between 0° and 360°)
As a result, an angle with a measure between 0° and 360° that is coterminal with -865° is 75°. We can infer that Angle b's measure is 75° because it contaminates with this angle.
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Select the correct answer.
This table represents value of a cubic polynomial function.
Based on the information in the table, which sentence best describes the interval [-2, 1]?
A. The function is increasing on the interval [-2, 1].
B. The function is both increasing and decreasing on the interval [-2, 1].
C. The function is decreasing on the interval [-2, 1].
D. The function is constant on the interval [-2, 1].
Elephants are born with tusks and their tusks grow 4 inches a year. A 1 year old elephants tusk measured 5 inches. Write a linear equation that represents the situation how long will the elephants tusk be at 6 years old
Answer: y = 4x + 1, 25 inches at 6 years old
Step-by-step explanation:
Our y-intercept will be 1 (5 inches at a year old - 4 inches per year = 1) with a slope of 4 (4 inches a year). Our equation will look like this:
y = 4x + 1
Next, to solve for the length of the tusk at 6 years old, we will input this value of 6 and solve.
y = 4x + 1 = 4(6) + 1 = 25 inches
See attached for a graph.
We can also check our work using a different method.
6 years - 1 year = 5 years
5 years * 4 inches a year = 20 inches
20 inches + current 5 inches = 25 inches at 6 years
When hungry, two puppies can eat a bowl of kibble in 9 seconds. How long do they take individually to eat the same bowl of kibble if one puppy takes 24 seconds longer than the other?
4. For the function f(x) = -3x + 64,
find x if f(x) = 34.
Step-by-step explanation:
F(x) = 34 so 34 = -3x + 64
- 30 = -3x
x = 10
prove that
cos x =
√csc²x-1
---------------------------
csc²x
By answering the presented question, we may conclude that Therefore, trigonometry the given identity is true.
what is trigonometry?The study of the connection between triangle side lengths and angles is known as trigonometry. The concept first originated in the Hellenistic era, during the third century BC, due to the application of geometry in astronomical investigations. The subject of mathematics known as exact techniques deals with certain trigonometric functions and their possible applications in calculations. There are six commonly used trigonometric functions in trigonometry. Sine, cosine, tangent, cotangent, secant, and cosecant are their separate names and acronyms (csc). The study of triangle characteristics, particularly those of right triangles, is known as trigonometry. As a result, geometry is the study of the properties of all geometric forms.
= 1/sin x
= √(1/sin²x - 1) / (1/sin²x)
= √(1 - sin²x) / sin x
= √(cos²x) / sin x
= √(1 - sin²x) / cos x
= √(csc²x - 1) / cos x
cos x = √(csc²x - 1) / cos x
cos²x = csc²x - 1
cos²x + sin²x = csc²x
1 = csc²x
Therefore, the given identity is true.
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what is the probability that mr. jackson will roll a 4 between 3 and 7 times, inclusive, out of his 30 rolls of a number cube?
Mr. Jackson will roll a 4 between 3 and 7 times, inclusive, out of his 30 rolls of a number cube is 0.332,
what is binomial probability formula?P(X=k) = [tex]C(n,k)[/tex][tex]* p^k * (1-p)^{n-k}[/tex]
Where:
P(X=k) is the probability of getting k successes
n is the total number of trials
k is the number of successful trials
p is the probability of success in one trial
(1-p) is the probability of failure in one trial
here, in the question given that
n = 30 (total number of rolls)
k = 3, 4, 5, 6, or 7 (number of times rolling a 4)
p = 1/6 (probability of rolling a 4 on one roll)
Now we can calculate the probability of rolling a 4 between 3 and 7 times:
P(3<=X<=7) = P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7)
now for each value of k, we get:
[tex]P(X=3) = C(30,3) * (1/6)^3 * (5/6)^{27} = 0.182[/tex]
[tex]P(X=4) = C(30,4) * (1/6)^4 * x)5/6)^{26} = 0.106\\P(X=5) = C(30,5) * (1/6)^5 * (5/6)^{25} = 0.035\\P(X=6) = C(30,6) * (1/6)^6 * (5/6)^{24} = 0.008\\P(X=7) = C(30,7) * (1/6)^7 * (5/6)^{23} = 0.001[/tex]
Adding these probabilities , we get:
P(3<=X<=7) = 0.182 + 0.106 + 0.035 + 0.008 + 0.001 = 0.332
Therefore, the probability that Mr. Jackson will roll a 4 between 3 and 7 times, inclusive, out of his 30 rolls of a number cube is 0.332,
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