Answer:
9x + 6 = 8
Step-by-step explanation:
"Sum" indicates addition problem. 9 times a number can be represented as 9x (with 9 and 'a number' being x). Then you add 6 because it states 'and 6'. Then, you add equals 8 (=8)
So your equation looks like:
9x + 6 = 8
Given the 4 points below, identify what shape is formed and how you found your answer.
Answer:
The shape formed is rectangle.
SOMEONE, PLEASE HELP ME!!
Answer:
c 96%
Step-by-step explanation:
Find the Area of the figure below, composed of a rectangle with a semicircle removed from it. Round to the nearest tenths place.
Step-by-step explanation:
as the description says, the area is a rectangle (8×4) minus the half-circle at the right.
the radius of the (half-)circle is 4/2 = 2, as 4 is the diameter.
the area of the circle is
pi×r² = pi×2² = 4pi
the area of the half-circle is then
4pi/2 = 2pi
the area of the rectangle is
8×4 = 32
the total area is
32 - 2pi = 25.71681469... ≈ 25.7 square units
Answer:
25.7 square units
Step-by-step explanation:
You want the area of a 4 × 8 rectangle with a semicircle of diameter 4 removed from the end.
AreaThe area of the enclosing rectangle is ...
A = LW
A = (8)(4) = 32 . . . . . square units
The are of the missing semicircle is ...
A = 1/2πr² . . . . . . where r is half the diameter
A = 1/2π(4/2)² = 2π ≈ 6.3 . . . . . square units
Then the area of the figure is ...
A = rectangle - semicircle = 32 -6.3 = 25.7 . . . . . square units
The area of the figure is about 25.7 square units.
The surface area of the prism is___square units.
Answer:
96
Step-by-step explanation:
a scientist has two solutions, which she has labeled solution a and solution b. each contains salt. she knows that solution a is 35% salt and solution b is 85% salt. she wants to obtain 150 ounces of a mixture that is 40% salt. how many ounces of each solution should she use?
Answer:
To solve this problem, we can use a system of equations. Let x be the number of ounces of solution A and y be the number of ounces of solution B. Then we have: x + y = 150 (total solution) 0.35x + 0.85y = 0.4(150) (total salt) Simplifying the second equation, we get: 0.35x + 0.85y = 60 Multiplying both sides of the first equation by 0.35 and subtracting from the second equation, we get: 0.5y = 15 y = 30 Substituting y = 30 into the first equation, we get: x + 30 = 150 x = 120 Therefore, the scientist should use 120 ounces of solution A and 30 ounces of solution B to obtain
The scientist should use 135 ounces of solution a and 15 ounces of solution b to obtain 150 ounces of a mixture that is 40% salt. This can be answered by the concept of system of equations.
To solve this problem, we can use a system of equations. Let x be the number of ounces of solution a used, and y be the number of ounces of solution b used. We want to find x and y such that:
x + y = 150 (we need 150 ounces of the mixture)
0.35x + 0.85y = 0.4(150) (the total amount of salt in the mixture should be 40% of 150 ounces)
We can solve this system of equations by first multiplying the second equation by 100 to get rid of the decimals:
35x + 85y = 6000
Then we can use the first equation to solve for one variable in terms of the other:
y = 150 - x
Substituting this into the second equation, we get:
35x + 85(150 - x) = 6000
35x + 12750 - 85x = 6000
-50x = -6750
x = 135
Therefore, the scientist should use 135 ounces of solution a and 15 ounces of solution b.
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For the following image, find x :
x =
Answer:
x = 11
Step-by-step explanation:
[tex] \frac{8}{48} = \frac{x}{x + 55} [/tex]
[tex]8(x + 55) = 48x[/tex]
[tex]8x + 440 = 48x[/tex]
[tex]40x = 440[/tex]
[tex]x = 11[/tex]
Steven went to the mall with some money. He bought 3 pairs of pants for $35 dollars each and 7 shirts for $10 dollars each. Now he has $25 dollars left. How much money did Steven start with?
The monthly expenses of a business can be modeled by y 2.75x + 7.5 The revenue generated by the business can be represented by the function y = 0.2x ^ 2 + 1.5x In each function, x is the number of months since the business opened and y is the amount of money in thousands of dollars. After how many months will the revenue earned be equal to the business's expenses.
Thus, the number of months when the revenue earned will be equal to the business's expenses is 8 months approx)
Explain about the quadratic function;f(x) = ax² + bx + c, from which a, b, and c are numbers and an is not equal to zero, is a quadratic function. A parabola is the shape of a quadratic function's graph. Even though "width" or "steepness" of a parabola can vary as well as its path of opening, they all share so same fundamental "U" form.
Given data:
monthly expenses's function: y = 2.75x + 7.5 .
revenue function: y = 0.2x² + 1.5x
x is the number of months
y is the amount of money (dollars)
monthly expenses = revenue function
2.75x + 7.5 = 0.2x² + 1.5x
On simplification:
0.2x² + 1.5x - 2.75x - 7.5 = 0
0.2x² - 1.25x - 7.5 = 0
Divide equation by 0.2
x² - 6.25x - 37.5 = 0
standard form of quadratic eq: ax² + bx + c = 0
On comparing:
a = 1, b = -6.25 and c = -7.5
Using the quadratic formula:
x = [tex](-b + \sqrt{b^{2} - 4 ac } )/ 2a[/tex] and x = [tex](-b - \sqrt{b^{2} - 4 ac } )/ 2a[/tex]
Put the values:
x = [tex](6.25 + \sqrt{-6.25^{2} - 4 *1*(-7.5) } )/ 2*1[/tex]
x = (6.25 + 8.31)/2
x = 7.28 (number of months)
x = 8 months approx
and x = [tex](6.25 - \sqrt{-6.25^{2} - 4 *1*(-7.5) } )/ 2*1[/tex]
x = (6.25 - 8.31)/2
x = -1.03 (negative value not taken)
Thus, the number of months when the revenue earned will be equal to the business's expenses is 8 months approx)
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complete question:
The monthly expenses of a business can be modeled by y = 2.75x + 7.5 The revenue generated by the business can be represented by the function y = 0.2x² + 1.5x. In each function, x is the number of months since the business opened and y is the amount of money in thousands of dollars. After how many months will the revenue earned be equal to the business's expenses.
Lillian owns a small business selling ice-cream. She knows that in the last week 12 customers paid cash, 28 customers used a debit card, and 42 customers used a credit card. Based on these results, express the probability that the next customer will pay with something other than a debit card as a fraction in simplest form.
By answering the presented question, we may conclude that As a result, equation the next client has a 27/41 chance of paying with something other than a debit card.
What is equation?An equation in mathematics is a statement that states the equality of two expressions. An equation is made up of two sides that are separated by an algebraic equation (=). For example, the argument "2x + 3 = 9" asserts that the phrase "2x Plus 3" equals the number "9." The purpose of equation solving is to determine the value or values of the variable(s) that will allow the equation to be true. Equations can be simple or complicated, regular or nonlinear, and include one or more elements. The variable x is raised to the second power in the equation "x2 + 2x - 3 = 0." Lines are utilized in many different areas of mathematics, such as algebra, calculus, and geometry.
There were 12 + 28 + 42 = 82 people in total, with 12 paying with cash and 28 using a debit card. As a result, the number of consumers who did not use a debit card is 82 - 28 = 54.
The chance that the next customer will not pay with a debit card is equivalent to the number of customers who did not pay with a debit card divided by the total number of customers. As a result, the likelihood is:
54/82
This fraction can be simplified by splitting the numerator and denominator by their largest common factor, which is 2:
54/82 = (2 × 27)/(2 × 41) = 27/41
As a result, the next client has a 27/41 chance of paying with something other than a debit card.
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Jeffrey is planning to tile his bathroom. He is taking measurements before he goes to the hardware store to buy the tile. What is the best unit of measure for Jeffrey to use?
A yards
B square feet
C square yards
D cubic feet
Answer:
best choice to answr is letter B.
Step-by-step explanation:
Square feet is the standard unit of measure for area in the United States and is commonly used for measuring the area of rooms and other surfaces, including floors and walls. By measuring the length and width of the bathroom in feet and multiplying these two measurements, Jeffrey can determine the total square footage of the bathroom's floor and walls that need to be tiled. This will help him accurately estimate the amount of tile he needs to purchase.
a bottle of soap cost 3.45 for 15 ounces. what is the cost per ounce?
Answer:
Step-by-step explanation:
15 divided by 15 is 1
3.45 divided by 15 is 0.23
The cost per ounce is 23 cents, or $0.23
A beekeeper estimates that his bee population will
grow 30% each year. Currently, he has 125 bees.
Type values into the blank spaces to write a function
that can predict the growth of the bee population
over time, where t is the time in years and B(t) is the
total bee population.
B(t) = ||
)t
(
Answer:
B(t) = 125*(1.3)^t
Step-by-step explanation:
The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.
Which drive-thru is able to estimate their wait time more consistently and why?
Burger Quick, because it has a smaller IQR
Burger Quick, because it has a smaller range
Super Fast Food, because it has a smaller IQR
Super Fast Food, because it has a smaller range
Burger Quick has a smaller IQR (Interquartile Range) than Super Fast Food, indicating that the middle 50% of the data is more tightly clustered around the median.
What is the superfast food?Super Fast Food is able to estimate their wait time more consistently because it has a smaller range, which means the wait times reported by the 20 people are more closely clustered around the median wait time of 12 minutes.
Burger Quick may predict wait times more reliably than Super Fast Food due to a reduced IQR (Interquartile Range).
The IQR is a measure of the spread of the middle 50% of data, defined as the difference between the third (Q3) and first (Q1) quartiles. A lower IQR shows that the middle 50% of the data is more closely grouped around the median, implying that the data is more consistent.
Burger Quick has an IQR of 14.5 (Q3=24, Q1=9.5) in this situation, while Super Fast Food has an IQR of 7 (Q3=15.5, Q1=8.5). As a result, Burger Quick has a lower IQR and can predict their wait time more reliably than Super Fast Food.
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Consider ΔABC with AB=2, BC=5, and AC=6. If the triangle is rotated around AB, what is the volume of the solid generated?
The volume of the solid generated by rotating ΔABC around AB is approximately 23.39 cubic units.
To find the volume of the solid generated by rotating ΔABC around AB, we can use the method of cylindrical shells.
First, we need to find the height of the cylinder that will be generated by the rotation. This height is simply the length of AB, which is 2.
Next, we need to find the circumference of the cylinder at any point along its height. To do this, we can use the fact that the circumference of a circle is given by 2πr, where r is the radius of the circle. In this case, the radius of the circle will be the distance from the axis of rotation (AB) to the edge of the triangle at that height.
Let x be the distance from vertex A to the point on AB directly below it. Then, at any height h, the radius of the circle will be given by:
r = BC - x
To find x, we can use the Pythagorean theorem. Let h be the height above vertex A, so that the distance from A to the base of the triangle is h/2. Then, the distance from vertex A to the point on AB directly below it is:
[tex]x = \sqrt{AB^2 - \left(\frac{h}{2}\right)^2} = \sqrt{2^2 - \left(\frac{h}{2}\right)^2}[/tex]
Now, we can find the volume of the solid generated by integrating the circumference of the cylinder at each height, multiplied by the height of the cylinder:
[tex]V = \int_0^2 2\pi\left(BC - \sqrt{2^2 - \left(\frac{h}{2}\right)^2}\right)dh[/tex]
We can simplify this integral using the substitution u = h/2, which gives:
[tex]V = 4\pi\int_0^1\left(BC - \sqrt{4 - u^2}\right)du[/tex]
Now, we need to plug in the values of BC and evaluate the integral:
[tex]V = 4\pi\int_0^1\left(5 - \sqrt{4 - u^2}\right)du[/tex]
= [tex]4\pi\left[\left(5u - \frac{u}{2}\sqrt{4 - u^2} - 2\arcsin\left(\frac{u}{2}\right)\right)\Bigg|_0^1\right][/tex]
≈ 23.39
Therefore, the volume of the solid generated by rotating ΔABC around AB is approximately 23.39 cubic units.
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please help with this geometry hmw
The correct option is B, that the reason that justifies that the lines are parallel.
Which reason justifies that the lines are parallel?We know that l and m are parallel, and we know that angles 1 and 3 have the same measure.
Notice that angles 1 and 3 are in opposite quadrants (second and fourth). If these where in the same intersection, these would be vertical angles, and thus have the same measure.
In this case we know that the angles have the same measure, then the lines a and b can only be parallel, this is proven by the alternate exterior angles converse (exterior because the angles are exterior to the square formed by the intersections).
So the correct option is B.
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Which represents an exterior anglA triangle is sitting on a horizontal line. The bottom left interior angle of the triangle is (9 + k) degrees. The exterior angle to the bottom left interior angle is (5 k minus 3) degrees.
What is the value of k?
e of triangle ABF?
The value of k is approximately 10.33.
What is the exterior angle?
An exterior angle is an angle that forms a linear pair with an interior angle of a polygon. It is formed by extending one of the sides of the polygon. In other words, it is the angle formed between a side of a polygon and the extension of an adjacent side.
In a triangle, the measure of an exterior angle is equal to the sum of the measures of its two remote interior angles. In this problem, the exterior angle to the bottom left interior angle is (5k - 3) degrees, and the corresponding remote interior angle is (9 + k) degrees. Therefore, we can write:
(5k - 3) = (9 + k) + x
where x is the other remote interior angle of the triangle.
Simplifying this equation, we get:
5k - 3 = 9 + k + x
4k = 12 + x
x = 4k - 12
Now, we know that the sum of the interior angles of a triangle is 180 degrees. So, we can write:
(9 + k) + (5k - 3) + x = 180
Substituting x with 4k - 12, we get:
(9 + k) + (5k - 3) + (4k - 12) = 180
Simplifying this equation, we get:
18k - 6 = 180
18k = 186
k = 10.33 (rounded to two decimal places)
Therefore, the value of k is approximately 10.33.
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Write an algebraic expression for this word problem
Author Jules Verne's fictional submarine, the Nautilus, traveled under the sea 20,000
leagues. Let 1 mile equal x leagues. How many miles did the Nautilus travel?
Properties of equality reference packet geometry
The properties used were the distributive property of multiplication over addition, the subtraction property of equality, and the multiplication property of equality.
What are properties?Properties are statements that are true for a wide range of numbers or equations. They are rules that describe the behavior of mathematical objects and relationships between them.
According to question:1) Given 4x-1=27, we can use the addition property of equality to add 1 to both sides:
4x-1+1 = 27+1
Simplifying, we get:
4x = 28
Then, we can use the multiplication property of equality to divide both sides by 4:
4x/4 = 28/4
Simplifying, we get:
x = 7
Therefore, we have proved that if 4x-1=27, then x=7.
The properties used were the addition property of equality and the multiplication property of equality.
2) Given (a/(-6))+2=5, we can use the subtraction property of equality to subtract 2 from both sides:
(a/(-6))+2-2 = 5-2
Simplifying, we get:
a/(-6) = 3
Then, we can use the multiplication property of equality to multiply both sides by -6:
(a/(-6))(-6) = 3(-6)
Simplifying, we get:
a = -18
Therefore, we have proved that if (a/(-6))+2=5, then a=-18.
3) The properties used were the subtraction property of equality and the multiplication property of equality.
Given -9(2x-3)=63, we can use the distributive property of multiplication over addition to simplify the left-hand side:
-9(2x-3) = -18x + 27
Then, we can use the subtraction property of equality to subtract 27 from both sides:
-18x + 27 - 27 = 63 - 27
Simplifying, we get:
-18x = 36
Finally, we can use the multiplication property of equality to divide both sides by -18:
(-18x)/(-18) = 36/(-18)
Simplifying, we get:
x = -2
Therefore, we have proved that if -9(2x-3)=63, then x=-2.
The properties used were the distributive property of multiplication over addition, the subtraction property of equality, and the multiplication property of equality.
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Help pls, Im very confused and zoning out. Can you please explain and how to work it out. I would very appreciate it. ♥️
Answer:
36 cm
Step-by-step explanation:
a = 1/2 h(b1+b2)
So 10 + 8 = 18 18x4= 72/2 = 36 cm
the weekly sales at two movie theaters were recorded for a random sample of 25 weeks. a 95 percent confidence interval for the difference in mean weekly sales for the two movie theaters was calculated as
To calculate the 95% confidence interval for the difference in mean weekly sales for the two movie theaters, follow these steps:
Step 1: Gather the data for the random sample of 25 weeks.
Step 2: Calculate the mean and standard deviation for each movie theater's weekly sales.
Step 3: Calculate the difference in mean weekly sales for the two movie theaters (subtract the mean of theater 2 from the mean of theater 1).
Step 4: Calculate the standard error of the difference by taking the square root of [(standard deviation of theater 1^2 / number of weeks) + (standard deviation of theater 2^2 / number of weeks)].
Step 5: Determine the critical value for a 95% confidence interval using a t-table or calculator (for a two-tailed test with 24 degrees of freedom, the critical value is approximately 2.064).
Step 6: Multiply the critical value by the standard error to get the margin of error.
Step 7: Calculate the lower and upper bounds of the confidence interval by subtracting and adding the margin of error from the difference in mean weekly sales.
The result will be the 95% confidence interval for the difference in mean weekly sales for the two movie theaters.
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George placed a compass on the vertices of the triangle and drew intersecting arcs to find points W, X, Y, and Z as shown. He is going to draw lines through the arcs and find their point of intersection.
The figure shows the triangle JKL in which JK is the perpendicular bisector of JL and WX is the perpendicular bisector of YZ.
What is George trying to find?
A.
one of the three different points that are equidistant from the three sides of the triangle
B.
one of the three different points that are equidistant from the three vertices of the triangle
C.
the only point that is equidistant from the three sides of the triangle
D.
the only point that is equidistant from the three vertices of the triangle
The answer of the given question based on the triangle is, option (A) one of the three different points that are equidistant from the three sides of the triangle.
What is Point of intersection?A point of intersection is a point where two or more lines, curves, or surfaces meet or cross each other. In geometry, the point of intersection can be used to find important properties of the objects involved, such as angles, distances, and coordinates.
George is trying to find point that is equidistant from three sides of the triangle.
The point of intersection of the lines passing through the arcs drawn from the vertices of the triangle using a compass is called the circumcenter of the triangle. The circumcenter is equidistant from three vertices of triangle, which means that it lies on perpendicular bisectors of three sides of triangle.
In this case, the perpendicular bisectors of JL and YZ are shown as lines JK and WX respectively. The circumcenter of triangle JKL is the point where these two lines intersect. This point is equidistant from the sides KL, LJ, and JK of the triangle.
Therefore, the answer is (A) one of the three different points that are equidistant from the three sides of the triangle.
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The answer is B. George is trying to find one of the three different points that are equidistant from the three vertices of the triangle.
Define the term Point of intersection?The intersection of two or more lines, curves, or surfaces is known as a point of intersection.
George is trying to find one of the three different points that are equidistant from the three vertices of the triangle JKL.
The intersection of the arcs drawn from the vertices of the triangle will be equidistant from those vertices. This point is called the circumcenter of the triangle, and it is the center of the circumcircle that passes through all three vertices of the triangle.
Since George is drawing lines through the arcs and finding their point of intersection, he is finding the circumcenter of the triangle. The circumcenter is one of the three different points that are equidistant from the three vertices of the triangle.
Therefore, the answer is B. George is trying to find one of the three different points that are equidistant from the three vertices of the triangle.
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a college bookstore store sells hoodies. they want to price their hoodies to sell as many as possible during homecoming week. the table below gives the price (in $) of their hoodies and the weekly quantity they would sell at this price. find the linear regression equation that gives the quantity of hoodies sold as a function of the price. round each coefficient in the regression equation to 2 decimal places.
The linear regression equation that gives the quantity of hoodies sold as a function of the price: y = -2.6147x + 215.34
And the number of hoodies the bookstore can sell if the price is $32. = 131
To find the linear regression equation that represents the quantity of hoodies sold as a function of the price, we will use a calculator or a spreadsheet program to perform linear regression analysis on the data.
The scatter plot with the line of linear regression of the data is shown below.
The linear regression equation that gives the quantity of hoodies sold as a function of the price is:
y = -2.6147x + 215.34
here x represents the price of hoodie and y represents the quantity of hoodies.
Now we determine the number of hoodies the bookstore can sell if the price is $32.
i.e., for x = 32 we need to find the value of y
y = -2.6147(32) + 215.34
y = 131.6696
y ≈ 131
Therefore, the number of hoodies the bookstore can sell if the price is $32. = 131
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Find the complete question below.
investment of $2,000 at 10% simple interest for 3 years
For the situation is below, define a random variable X for the situation, and then decide if they follow a binomial distribution model by commenting on the floor requirements.
1. You roll a DnD (20-sided), 20 times and record the number that shows on the dice.
After answering the presented question, we can conclude that The equation number of trials is predetermined: We're going to roll the dice 20 times.
What is equation?An equation is a statement in mathematics that shows that two expressions are equal. It consists of two sides separated by an equal sign (=). For example, 2 + 3 = 5 is an equation because the expression on the left-hand side (2 + 3) is equal to the expression on the right-hand side (5).
Equations are used in many areas of mathematics, science, and engineering to describe relationships between quantities and to solve problems. For example, equations are used to model physical phenomena, such as the motion of objects, the behavior of fluids, and the propagation of waves. They are also used in finance, statistics, and many other fields to analyze data and make predictions.
In this case, the random variable X reflects the number of times a specific number appears after rolling a 20-sided die 20 times.
To see if this situation fits the binomial distribution model, we must look at the four conditions listed below:
The trials are impartial: Each throw of the dice is distinct from the others.
There are just two possibilities: Each roll can produce one of the 20 numbers or none at all.
The likelihood of success is constant: The probability of rolling a given number on a 20-sided dice is the same for each roll.
The number of trials is predetermined: We're going to roll the dice 20 times.
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Tyler’s fish tank has 12 orange fish and 4 grey fish. What is the ratio of orange fish to Grey fish
Answer:
12:4
=3:1 (Simplified )
2/3(4a-15)-1/9(6a-2)
Answer:
Step-by-step explanation:
Hey Love:
here's the answer,
2/9(9a-44)
a campus radio station surveyed 500 students to determine the types of music they like. the survey revealed that 197 like rock, 162 like country, and 122 like jazz. moreover, 22 like rock and country, 22 like rock and jazz, 27 like country and jazz, and 7 like all three types of music. what is the probability that a randomly selected student likes country but not rock?
The probability that a randomly selected student likes country but not rock is 29.4%.
We know that,
P(country but not rock) = P(country) - P(country and rock)
So to calculate P(country), we know from the survey that 162 students like country and to calculate P(country and rock), we need to subtract the number of students who like all three types of music (7) from the number of students who like both country and rock (22), which gives us 22 - 7 = 15.
Therefore, P(country but not rock) = 162/500 - 15/500 = 147/500 = 0.294.
So the probability that a randomly selected student likes country but not rock is 0.294 or 29.4%.
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on saturday, zoe is playing in the royal arena chess tournament. based on her competitors' rankings, she estimates she has a 50% chance of winning each match. zoe will play 8 matches and needs to win at least 5 of them to make it to the finals on sunday. how likely is it that zoe will make it to the finals? zoe simulates the situation by rolling a six-sided die 8 times. each time an even number appears, it represents zoe winning a match. this table shows the results of 200 trials: number of even numbers012345678 number of trials02184961421891 based on zoe's results, what is the probability that she will make it to the finals?
20 trials may not be enough to get a reliable estimate of the probability, especially if the true probability is close to 0.5.
Based on Zoe's results,
The probability that she will make it to the finals of the Royal Arena Chess Tournament is 96.2%.
Here's how to solve the problem:
Zoe must win at least 5 matches out of 8 to make it to the finals.
There are different ways to solve the problem, but one way is to use the binomial probability formula:
P(X = k) = (n choose k) * [tex]P^{k}[/tex] * [tex]q^{n-k}[/tex]
where:
P(X = k) is the probability of getting exactly k successes out of n trialsn is the number of trialsp is the probability of success in one trialq is the probability of failure in one trial is the probability of getting k successes q^(n-k) is the probability of getting n-k failures(n choose k) is the binomial coefficient, which represents the number of ways to choose k objects out of n distinct objects without regard to order (n choose k) = n! / (k! * (n-k)!)
The binomial probability formula is used to calculate the probability of getting a specific number of successes in a fixed number of independent trials, each with the same probability of success.
It is a discrete probability distribution that describes the probability of X successes in n trials.For this problem:P(X >= 5) = P(X = 5) + P(X = 6) + P(X = 7) + P(X = 8)where:P(X >= 5) is the probability of getting at least 5 successes out of 8 trialsP(X = 5) is the probability of getting exactly 5 successes out of 8 trialsP(X = 6) is the probability of getting exactly 6 successes out of 8 trialsP(X = 7) is the probability of getting exactly 7 successes out of 8 trialsP(X = 8) is the probability of getting exactly 8 successes out of 8 trials
T[tex]0.5^{5}[/tex]he probabilities can be calculated using the binomial probability formula with n = 8 and p = 0.5
Since Zoe estimates she has a 50% chance of winning each match
P(X = 5) = (8 choose 5) * [tex](0.5)^5[/tex]* [tex](0.5)^{(8-5)[/tex] = 56 * 0.03125 * [tex]0.5^3[/tex]
= 0.21875P(X = 6)
= (8 choose 6) * [tex](0.5)^6[/tex] * [tex](0.5)^{(8-6)[/tex]
= 28 * 0.015625 * [tex]0.5^2[/tex]
= 0.109375P(X = 7)
= (8 choose 7) * [tex](0.5)^7[/tex] * [tex](0.5)^{(8-7)[/tex]
= 8 * 0.0078125 *[tex]0.5^1[/tex]
= 0.03125P(X = 8)
= (8 choose 8) * [tex](0.5)^8[/tex] * [tex](0.5)^{(8-8)[/tex]
= 1 * 0.00390625 * [tex]0.5^0[/tex]
= 0.00390625P(X >= 5)
= 0.21875 + 0.109375 + 0.03125 + 0.00390625
= 0.36328125
Therefore, the probability that Zoe will make it to the finals of the Royal Arena Chess Tournament is approximately 36.3%.
However, Zoe simulates the situation by rolling a six-sided die 8 times.
The simulation gives an estimate of the probability, which may be different from the exact probability calculated using the binomial probability formula.
The simulation results may also depend on the sample size (i.e., the number of trials).
In this case, 200 trials may not be enough to get a reliable estimate of the probability, especially if the true probability is close to 0.5.
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Based on Zoe's 200 trials in the simulation the probability that she will make it to the finals means 22% chance.
The probability of her making it to the finals can be calculated by looking at the number of trials where she won at least 5 matches.
According to the table, she won 5, 6, 7, or 8 matches in 14, 21, 8, and 1 trials, respectively.
To find the probability,
1. Add up the number of trials where Zoe won at least 5 matches: 14 + 21 + 8 + 1 = 44 trials
2. Divide this sum by the total number of trials (200): 44/200
In the simulation,
Each even number represents a win for Zoe.
Therefore, we can calculate the probability of Zoe winning at least 5 matches by adding up the probabilities of getting 5, 6, 7, or 8 even numbers in 8 rolls of a six-sided die.
Using the table provided, we can see that there are 218 trials out of 200 where Zoe gets 5 or more even numbers. Therefore, the probability of Zoe winning at least 5 matches is:
218/200 = 1.09 or 109%
This means that based on the simulation, Zoe is more likely than not to make it to the finals.
However,
It is important to note that the simulation assumes that each match has a 50% chance of being won by Zoe, which may not be accurate in real life.
The actual probability of Zoe making it to the finals may be different from the simulation results.
So, based on Zoe's results, the probability that she will make it to the finals is 44/200 or 0.22, which means a 22% chance.
This is based on her simulation using a six-sided die, not her actual 50% chance of winning each match.
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1+20
i dont knwo what it it
Answer:
21
Step-by-step explanation:
20+1=21
Triangle LMN with vertices L(1, 6), M(8, 7),
and N(5, 2): 270°
counterclockwise
Answer & step-by-step explanation:
To rotate a point (x, y) 270° counterclockwise about the origin, we can swap the x and y coordinates and negate the new x coordinate. So the new coordinates for L(1, 6) would be:
x' = -6
y' = 1
Therefore, the new vertex for L would be (-6, 1). Similarly, the new vertices for M(8, 7) and N(5, 2) would be:
M': (-7, 8)
N': (2, 5)
So the rotated triangle would have vertices L'(-6, 1), M'(-7, 8), and N'(2, 5).
Answer:
M': (-7, 8)
N': (2, 5)
Step-by-step explanation:
I did the test
Hope this helps :)