Answer: the probability that a randomly selected student would want to do a musical is 20 percent
Step-by-step explanation:
5/25 = 0.2
20 percent
whats the answer to this
The measures of the angles x and y are:
∠x = 72°∠y = 54°How to determine the values of ∠x and ∠y?We actually only need one of the two diagrams to solve this. Remember that the sum of the interior angles of any triangle is always equal to 180°.
Now for the riagram in the left, we can just write an equation:
∠x + ∠y + ∠y = 180°
Also, notice that 5 times the angle x should be equal to 360°, then we know that:
5*∠x = 360°
∠x = 360°/5 = 72°
Now we can input that in the other equation to get:
∠x + ∠y + ∠y = 180°
72° + 2∠y = 180°
2∠y = 180° - 72°
∠y = 108°/2
∠y = 54°
These are the measures of the angles.
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For each right prism, find:
( a ) the lateral area,
( b ) the total area, and
( c ) the volume.
a) The lateral area of a rectangular prism is 360 square units. b) The total area of a rectangular prism is 6 square units. c) The volume of is 1200 cubic units.
What is a prism?A prism is a three-dimensional solid consisting of two bases that are parallel and congruent and are joined by a series of parallelograms. A prism's lateral faces are all parallelograms or rectangles. On the other hand, a pyramid is a three-dimensional solid with a polygonal base and an apex. A pyramid's lateral faces are triangles that converge at the top. The perpendicular distance between the bases of a prism determines its height, whereas the distance between the apex and base of a pyramid determines its height.
a) The lateral area of a rectangular prism is given by 2h(l+w):
Substituting the values we have:
2(6)(20+10) = 360 square units
b) The total area of a rectangular prism is given by 2lw + 2lh + 2wh:
Substituting the values we have:
2(20)(10) + 2(20)(6) + 2(10)(6) = 520 square units.
c) Volume is given as V = lwh substituting the values we have:
(20)(10)(6) = 1200 cubic units.
For Cube:
a) The lateral area is give as 4s(s)
Substituting the values:
LA = 4(1)(1) = 4
b) The total area is given as 6(s)(s):
Substituting the values:
TSA = 6(1)(1) = 6 square units.
c) The volume is given as s^3:
(1)^3 = 1 cubic unit.
For the triangular prism:
a) The lateral area is given as perimeter of base multiplied by height.
The perimeter of the base is (8 + 6 + 10) = 24, and h = 8.
LA = (24)(8) = 192 square units.
b) The total area is given by area of base + the lateral area:
Area of the base triangle is:
A = 1/2(6)(8) = 24
For two triangles at the base we have: 2(24) 48
Thus, total area of the prism is 176 + 48 = 224 square cm.
c) The volume of the triangular prism is given as:
1/2(base x height) x length = 1/2(6)(8)(8) = 192 cubic cm.
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what is the answer to this equation?
7/10 divided by 1/3
Answer:
To divide fractions, we can multiply the first fraction by the reciprocal of the second fraction.
So, 7/10 divided by 1/3 can be written as:
(7/10) ÷ (1/3) = (7/10) x (3/1)
Multiplying the numerators and denominators, we get:
(7 x 3) / (10 x 1) = 21/10
Therefore, the answer is 21/10, which is an improper fraction. We can simplify it to a mixed number by dividing the denominator into the numerator.
21 ÷ 10 = 2 with a remainder of 1, so the mixed number is:
= 1 1/10
Hence, the answer is 1 1/10 or 11/10.
Step-by-step explanation:
7/10 / (1/3) is equal to 7/10 * 3/1 = (7*3) / (10*1) = 21/10 = 2 1/10
A family is building a sandbox for their yard that is shaped like a rectangular prism. They would like for the box to have a volume of 43,972.5 in3. If they already have the length measured at 71.5 inches and the width at 60 inches, what is the height needed to reach the desired volume?
the height needed to reach the desired volume of the sandbox is 13.75 inches. The family can build the sandbox with these dimensions: 71.5 inches length, 60 inches width, and 13.75 inches height.
How to solve the question?
To find the height of the rectangular prism sandbox, we can use the formula for the volume of a rectangular prism, which is:
V = l × w × h
Where V is the volume, l is the length, w is the width, and h is the height.
We know that the volume of the sandbox is 43,972.5 cubic inches, and the length and width are 71.5 inches and 60 inches, respectively. So we can plug in these values into the formula and solve for h:
43,972.5 = 71.5 × 60 × h
Divide both sides by (71.5 x 60):
h = 43,972.5 / (71.5 x 60)
h = 13.75 inches
Therefore, the height needed to reach the desired volume of the sandbox is 13.75 inches. The family can build the sandbox with these dimensions: 71.5 inches length, 60 inches width, and 13.75 inches height.
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Answer: 9.2 inches
Step-by-step explanation: i took the test
have a good day and year and life!
someone help me plsss
The fraction of the panel left after cutting the hole is 11/12.
The correct answer choice is option C
What is the fraction of the panel is left?Fraction left = (area of panel) - (area of hole) / (area of panel
Area of panel = 3 feet × 2 feet
= 6 square feet
Area of hole = 1 foot × ½ foot
= ½ square foot
So,
Fraction left = (area of panel) - (area of hole) / (area of panel
= (6) - (½) / (6)
= (5½) / (6)
= 11/2 ÷ 6
multiply by the reciprocal of 6
= 11/2 × 1/6
= 11/12
Ultimately, the fraction left is 11/12
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I attached the question
x = -3 is the vertical asymptote of the function.
What is vertical asymptote?A vertical asymptote of a function is a vertical line on the graph where the function approaches positive or negative infinity as the input (x-value) approaches a certain value.
According to question:To identify the vertical asymptote(s) of the rational function f(x) = (x + 4)/(2x + 6), we need to look for the values of x that make the denominator equal to zero.
So, we solve the equation 2x + 6 = 0 for x:
2x = -6
x = -3
Therefore, x = -3 is the vertical asymptote of the function.
The other answer choices (B) x = -4 and (C) y = 1/2 are not correct as they do not make the denominator of the function equal to zero. And (D) is also not correct as this function has a vertical asymptote at x = -3.
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PLEASE HELP ON QUESTION!!!!
Rebecca is x years old . Mary is x+8 years older than rebecca.
Jill is there times older than mary. Sum of their ages in total is 67 .
A) form an equation in terms of x .
If answer is correct I'll rate you five stars a thanks and maybe even brainliest.
Thus, the linear equation in terms of x that shows the sum of all three ages of Rebecca , Mary and Jill : 5x + 32 = 67.
Explain the term "linear equation":Any pattern of numbers that consistently increases or decreases in value by the same amount is known as a linear equation. As a result, the only two elements we require to establish a linear equation are the point at which the pattern starts and the distance it travels.
The linear equation y = mx + b, with the m value representing the slope and the b value representing the y-intercept, is what is left.
Given that-
age of Rebecca = x yearsage of mary = x + 8 yearsThen,
age of Jill = 3(x + 8) years
Sum of all is 67.
Linear equation:
x + x + 8 + 3(x + 8) = 67 ...eq 1
2x + 8 + 3x + 24 = 67
5x + 32 = 67
3x = 67 - 32
3x = 35
x = 35/3
Thus, the linear equation in terms of x that shows the sum of all three ages of Rebecca , Mary and Jill : 5x + 32 = 67.
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HELP FAST PLEASEEE!!!!
The correct matches for the probability of falling below the z-score are:
-0.08: 0.4681
0.63: 0.7357
-2.7: 0.0035
1.95: 0.9744
Explain probability
Probability is a measure of the likelihood or chance of an event occurring. It is expressed as a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain. Probability is calculated by dividing the number of favourable outcomes by the total number of possible outcomes. Probability is used in many fields, including mathematics, statistics, science, economics, and finance, to make predictions and decisions based on uncertain events.
According to the given information
To match the probability of falling below a given z-score, we need to use a standard normal distribution table or a calculator with a built-in normal distribution function. Here are the probabilities for each z-score:
For a z-score of -0.08, the probability of falling below it is 0.4681.For a z-score of 0.63, the probability of falling below it is 0.7357.For a z-score of -2.7, the probability of falling below it is 0.0035.For a z-score of 1.95, the probability of falling below it is 0.9744.To know more about probability visit
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In a bag there are 3 red marbles, 2 yellow marbles, and 1 blue marble. What is the likelihood of a yellow marble being selected on the first draw?
likely
unlikely
even chance
certain
Therefore, it is not even chance, but it is also not very unlikely. It is moderately likely that a yellow marble will be selected on the first draw.
What is Probability?Probability is a branch of mathematics that deals with the study of random events and their likelihood of occurring. It is a measure of the likelihood or chance of an event happening. Probability is expressed as a number between 0 and 1, where 0 means the event is impossible, and 1 means the event is certain.
In other words, probability is a way of quantifying uncertainty. It is used in various fields, such as statistics, physics, finance, engineering, and more, to help make predictions and decisions based on uncertain information. Probability theory provides a set of rules and tools for analyzing and manipulating random variables and events, and for calculating the probability of complex events.
The likelihood of a yellow marble being selected on the first draw can be calculated by dividing the number of yellow marbles by the total number of marbles in the bag:
likelihood of selecting a yellow marble = number of yellow marbles / total number of marbles
So, in this case, the likelihood of selecting a yellow marble on the first draw is:
likelihood of selecting a yellow marble = 2 / (3 + 2 + 1) = 2/6 = 1/3
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In a survey of 180 people, it was found that 95 people liked tea 80 people liked milk and 35 did not like both tea and milk. 1)Find how many people like both tea and milk. 2)Represent the above information in a Venn-diagram.
In this Venn diagram, the number 30 appears in the overlapping region of the circles, and the number 35 appears outside of both circles.
Venn diagram explained.
Let's use T to represent the set of people who like tea, M to represent the set of people who like milk, and U to represent the universal set of all 180 people. We know that:
|T| = 95 (the number of people who like tea)
|M| = 80 (the number of people who like milk)
|T ∪ M| = 180 - |T ∩ M| = 180 - 35 = 145 (the number of people who like either tea or milk)
To find the number of people who like both tea and milk, we can use the formula:
|T ∩ M| = |T| + |M| - |T ∪ M|
Substituting in the values we know, we get:
|T ∩ M| = 95 + 80 - 145 = 30
Therefore, 30 people like both tea and milk.
To represent this information in a Venn diagram, we can draw two overlapping circles to represent the sets T and M. The circle for T should contain 95 elements, and the circle for M should contain 80 elements. The overlap region between the circles should contain 30 elements. The region outside of both circles should contain 35 elements, since 35 people do not like either tea or milk. The Venn diagram would look like this:
_______________
/ \
/ \
/ T \
\ /
\_________________/
|
| 30
|
______/ \______
/ \
/ \
/ M \
\ /
\_________________/
In this diagram, the number 30 appears in the overlapping region of the circles, and the number 35 appears outside of both circles.
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The following data values represent a population. What is the variance of the population? u = 12. Use the information in the table to help you.
A. 18 B. 41 O C. 12 OD. 80
x 3 11 13 21
(x-μ)² 81 1 1 81
The variance of the population according to the given table is option B 41.
What is variance?The spread or dispersion of a set of data around its mean is measured by variance. It has the same units as the original data and is calculated as the average of the squared deviations from the mean. Variance is a frequently used statistical term to describe the diversity or variability of a population or sample. When the variance is modest, the data points are closely grouped around the mean, whereas when the variance is great, the data points are widely dispersed.
The variance is given by the formula:
variance = (sum of squared deviations from the mean) / (number of observations)
Using the table we have sum of squared deviations from the mean:
81 + 1 + 1 + 81 = 164
variance = 164 / 4 = 41
Hence, the variance of the population according to the given table is option B 41.
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A coordinate plane with 2 lines drawn. The first line is labeled f(x) and passes through the points (0, negative 2) and (1, 1). The second line is labeled g(x) and passes through the points (negative 4, 0) and (0, 2). The lines intersect at about (2.5, 3.2)
How does the slope of g(x) compare to the slope of f(x)?
The slope of g(x) is the opposite of the slope of f(x).
The slope of g(x) is less than the slope of f(x).
The slope of g(x) is greater than the slope of f(x).
The slope of g(x) is equal to the slope of f(x)
Therefore, the correct answer is: The slope of g(x) is less than the slope of f(x).
Where do the X and Y axes intersect on the coordinate plane, at position 0 0?The origin is the location where the two axes meet. On both the x- and y-axes, the origin is at 0. The coordinate plane is divided into four portions by the intersection of the x- and y-axes. The term "quadrant" refers to these four divisions.
We can use the slope formula to get the slopes of the lines f(x) and g(x):
slope of f(x) = (change in y)/(change in x) = (1 - (-2))/(1 - 0) = 3/1 = 3
slope of g(x) = (change in y)/(change in x) = (2 - 0)/(0 - (-4)) = 2/4 = 1/2
The slope of g(x) is 1/2, which is less than the slope of f(x), which is 3.
Therefore, the correct answer is: The slope of g(x) is less than the slope of f(x).
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How how much water can this container hold? Use 3.14 to approximate high battery to the nearest 100
A spherical container having a radius of 8 cm will be able to contain approximately 2688.53 cm³ of water.
To solve the question :
The volume of a sphere = 4/3 πr³
Where,
π = mathematical constant pi and
r = radius of the sphere.
Given,
radius (r) = 8 cm and
π = 3.14,
Substituting the values of π and r to the volume equation
V = (4/3) x 3.14 x 8³
V = (4/3) x 3.14 x 512
V = 2688.53 cm³ (rounding off to the nearest hundredth)
Hence, a spherical container having a radius of 8 cm will be able to contain approximately 2688.53 cm³ of water.
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A film distribution manager calculates that 6%
of the films released are flops.
If the manager is right, what is the probability that the proportion of flops in a sample of 540
released films would be greater than 8%
? Round your answer to four decimal places.
April buys soil for her flowerpots. she uses 9 kilograms of soil for her violets and 4 kilograms of soil for her tulips. she has 3,000 grams of soil left for some daisies (1 kilogram = 1,000 grams) use the drop down menus to show how much soil she bought
April bought 16 kilograms of soil in total.
To show how much soil April bought
We need to add the amounts of soil she used for her violets and tulips. Since April used kilograms for violets and tulips, we need to convert the 3,000 grams to kilograms before we can add them up.
April bought:
9 kilograms of soil for violets
4 kilograms of soil for tulips
3 kilograms of soil for daisies (since 3,000 grams is 3 kilograms)
Therefore, April bought 16 kilograms of soil in total.
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find the perimeter of a regular polygon with 15 sides each measuring 11cm and an apothem 18.4cm long
The perimeter of the regular polygon with 15 sides, each measuring 11 cm and an apothem of 18.4 cm, is approximately 166.05 cm.
What is polygon?
A polygon is a two-dimensional geometric shape that is made up of straight lines connecting a sequence of points, which are called vertices.
To find the perimeter of a regular polygon with 15 sides, we need to know the length of each side. However, we are given the apothem, which is the distance from the center of the polygon to the midpoint of any side.
We can use the apothem and the number of sides to find the length of each side using the formula:
length of each side = 2 × apothem × tan(π/n)
where n is the number of sides and π is the mathematical constant pi (approximately equal to 3.14159).
Substituting the given values, we get:
length of each side = 2 × 18.4 cm × tan(π/15)
length of each side ≈ 11.07 cm
Now that we know the length of each side, we can find the perimeter by multiplying it by the number of sides:
perimeter = number of sides × length of each side
perimeter = 15 × 11.07 cm
perimeter ≈ 166.05 cm
Therefore, the perimeter of the regular polygon with 15 sides, each measuring 11 cm and an apothem of 18.4 cm, is approximately 166.05 cm.
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K
A survey was conducted that asked 1012 people how many books they had read in the past year. Results indicated that
x= 10.4 books and s= 16.6 books. Construct a 95% confidence interval for the mean number of books people read. Interpret
the interval.
Click the icon to view the table of critical t-values.
Construct a 95% confidence interval for the mean number of books people read and interpret the result. Select the correct
choice below and fill in the answer boxes to complete your choice.
(Use ascending order. Round to two decimal places as needed.)
OA. There is 95% confidence that the population mean number of books read is between
OB. If repeated samples are taken, 95% of them will have a sample mean between
OC. There is a 95% probability that the true mean number of books read is between
and
and
and
The 95% confidence interval for the mean number of books people read is (9.403, 11.397).
What is confidence interval?A confidence interval is a range of values that is likely to contain an unknown population parameter with a certain degree of confidence, based on a sample of data.
According to question:To construct a 95% confidence interval for the mean number of books people read, we can use the formula:
CI = x ± t*(s/sqrt(n))
where x = 10.4 is the sample mean, s = 16.6 is the sample standard deviation, n = 1012 is the sample size, and t is the critical value from the t-distribution with 1011 degrees of freedom and a 95% confidence level.
Looking up the critical value from the t-distribution table with 1011 degrees of freedom and a 95% confidence level, we get t = 1.962.
Substituting the values into the formula, we get:
CI = 10.4 ± 1.962*(16.6/sqrt(1012))
Simplifying the expression, we get:
CI = 10.4 ± 0.997
Therefore, the 95% confidence interval for the mean number of books people read is (9.403, 11.397).
Interpretation: We are 95% confident that the true mean number of books people read in the population lies between 9.403 and 11.397 books. This means that if we were to repeat the survey many times and calculate the confidence interval each time, approximately 95% of the intervals would contain the true population mean.
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The 95% confidence interval for the mean number of books people read is (9.403, 11.397).
What is confidence interval?
A confidence interval is a range of values that is likely to contain an unknown population parameter with a certain degree of confidence, based on a sample of data.
According to question:
To construct a 95% confidence interval for the mean number of books people read, we can use the formula:
[tex]CI = x \pm t\times(\frac{s}{\sqrt n})[/tex]
where x = 10.4 is the sample mean, s = 16.6 is the sample standard deviation, n = 1012 is the sample size, and t is the critical value from the t-distribution with 1011 degrees of freedom and a 95% confidence level.
Looking up the critical value from the t-distribution table with 1011 degrees of freedom and a 95% confidence level, we get t = 1.962.
Substituting the values into the formula, we get:
[tex]CI = 10.4 \pm( 1.962\times\frac{16.6}{\sqrt1012})[/tex]
Simplifying the expression, we get:
CI = 10.4 ± 0.997
Therefore, the 95% confidence interval for the mean number of books people read is (9.403, 11.397).
Interpretation: We are 95% confident that the true mean number of books people read in the population lies between 9.403 and 11.397 books. This means that if we were to repeat the survey many times and calculate the confidence interval each time, approximately 95% of the intervals would contain the true population mean.
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Which equations are true for x = –2 and x = 2? Select two options x2 – 4 = 0 x2 = –4 3x2 + 12 = 0 4x2 = 16 2(x – 2)2 = 0
Answer: x2 - 4 = 0 and 4x2 = 16
Step-by-step explanation:
Terrence finished the word search in 3/4 the time it took Frank. Charlotte finished the word search in 2/3 the time it took Terrance. Frank finished a word search in 32 minutes. how long did it take Charlotte to finish the word search?
In order to calculate the time that Charlotte took we just first have to calculate the time that Terrence took to finish the word search, that is done by multiplying the 32 minutes that Frank took by the three quartes that it took Terrence:
[tex]\text{Time}=\huge \text(\dfrac{3}{4} \huge \text)(32)[/tex]
[tex]\text{Time}=\huge \text(\dfrac{96}{4} \huge \text)[/tex]
[tex]\text{Time}=24[/tex]
So now we know that It took Terrence 24 minutes, and that Charlotte took two thirds of that time so we now just multiply that:
[tex]\text{Time}=\huge \text(\dfrac{2}{3} \huge \text)(24)[/tex]
[tex]\text{Time}=\huge \text(\dfrac{48}{3} \huge \text)[/tex]
[tex]\boxed{\underline{\bold{Time=16}}}[/tex]
Identify the outlier in the data set, and determine how the outlier affects the mean, median, and mode of the data.
95, 88, 72, 26, 69, 78, 97
GROUP OF ANSWER CHOICES
A. 97; adding the outlier decreased mean by 5 and median by 8.2. The mode did not change.
B. 26; adding the outlier decreased mean by 8.2 and median by 5. The mode did not change.
C. 97; adding the outlier increased mean by 8.2 and median by 5. The mode did not change.
D. 26; adding the outlier increased mean by 5 and median by 8.2. The mode did not change.
Answer:
B
Step-by-step explanation:
26 is the smallest number in this data set by a lot. As for how it changes the three Ms:
Mean
Mean without outlier: 83.2
Mean with outlier: 75
83.2 - 75 = 8.2
Median: The middlemost number in the graph. Before the outlier was added, the median would be 83, since it is the average of the two middle most numbers; 78 and 88. With the addition of 26 to this data set, the median is now just 78. This overall leads to a decrease of 5.
83 - 78 = 5
Mode: The number that shows up the most. However, since all of these numbers show up only once, we can ignore this.
Therefore, the answer is B.
Helpppp
The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain after 2000 years? -------------
The sample will have decayed by approximately 280.5 mg after 2000 years.
What is amount?Amount is a term used to refer to a quantity or sum of money. The term can also refer to a quantity of something other than money, such as a number of items, or a measure of something, such as time or distance. Amount is often used in the context of money and finance, to refer to the total amount of money owed, borrowed, or spent. It is also used to refer to the total amount of an asset, such as stock or property, that is owned by an individual or business.
The half-life of Radium-226 is 1590 years, which means that in 1590 years, half of the original amount of the substance will have decayed. After 2000 years, the amount of Radium-226 will be the remaining amount from the original 300 mg, minus the amount that decayed over the 410 years.
To calculate this, we can use the following equation:
Remaining Amount = Original Amount * (1/2)(Time/Half-Life)
Substituting in the values for the original amount and the half-life, we get:
Remaining Amount = 300 mg * (1/2)(2000/1590)
Performing the calculation, we get that the remaining amount of Radium-226 after 2000 years is approximately 19.5 mg. Therefore, the sample will have decayed by approximately 280.5 mg after 2000 years.
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Name one right angle.
Name one straight angle.
What is the mean of the data set {4.2, 3.5, 4.55, 2.75, 2.25}?
Answer: 3,45
Step-by-step explanation:
Answer:
3.45
Step-by-step explanation:
Mean is the average of the data set. To find the mean, we need to add all the numbers and divide by the amount of numbers.
{4.2, 3.5, 4.55, 2.75, 2.25}
4.2 + 3.5 + 4.55 + 2.75 + 2.25 = 17.25
17.25/5 = 3.45
25-3x=40
Please help
Answer:
-5
Step-by-step explanation:
subtract 25 by 25 and do it to the other side than the last thing to do is just divided 15 by -3 and we get -5.
PLS GIVE BRAINLIST
have a nice day
Answer:
-3x=40-25
resta los términos
-3x=15
multiplica ambos lados
3x( -1/3)=15 (-1/3)
3x(-1/3)=-5
x=-5
PROBABILITY:
b) A Jar contains four green tickets numbered one to four,
Six blue tickets numbered one to six, and two red tickets
numbered one to two. You randomly pick a ticket.
The probability of picking a blue marble or a marble with an odd number is 7/9.
How to solve the probabilityWe can use set theory to calculate the probability of picking a blue marble or a marble with an odd number. Let B be the set of blue marbles and O be the set of marbles with odd numbers. Then, we need to calculate the probability of the union of B and O.
P(B or O) = P(B U O) = P(B) + P(O) - P(B and O)
We know that P(B) = 4/9 and P(O) = 5/9. To calculate P(B and O), we need to count the number of marbles that satisfy both conditions, i.e., they are blue and have an odd number. There are two such marbles: B1 and B3.
Therefore, P(B and O) = 2/9, and the probability of picking a blue marble or a marble with an odd number is:
P(B or O) = P(B U O) = P(B) + P(O) - P(B and O) = 4/9 + 5/9 - 2/9 = 7/9
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All the angles in the figure are right angles, and the lengths shown are measured in meters.
12 m
What is the perimeter of this figure?
34.75 meters
37 meters
43.75 meters
46 meters
7.75 m
5.25 m
4.5 m
2m
3.25 m
The perimeter of the figure is 37 m.
Explain perimeter
Perimeter is the distance around the edge of a two-dimensional shape, such as a polygon or a circle. It is calculated by adding the length of all the sides of the shape. Perimeter is a fundamental measure in geometry and is used to determine the amount of material needed to enclose a shape, such as fencing or paving. It is also used to compare the size of different shapes with the same perimeter.
According to the given information
The perimeter of the figure is
12+12+7.75+2+3.25 = 37m
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Let X1,...,Xm and Y1,...,Yn be two random samples, both from normal distribution. They have common variance σ^2 , and different mean μX,μY, respectively. Find the distribution of (Sx)^2/(Sy)^2, where (Sx)^2,(Sy)^2 are sample variances.
The sample variance ratio, denoted by [tex]$\frac{S_x^2}{S_y^2}$[/tex], which follows an F-distribution.
What exactly is a normal distribution?The sample variance for a random sample of size (m) from a normal distribution with mean [tex]$\mu_X$[/tex] and common variance [tex]$\sigma^2$[/tex] is given by:
[tex]S_{x} ^2 =\frac{1}{m-1}\sum_{i=1}^{m}($X_i$-$\overline{X}$)^2[/tex]
where [tex]$X_i$[/tex] are the individual observations from the sample, and [tex]$\overline{X}$[/tex] is the sample mean.
Similarly, the sample variance for a random sample of size (n) from a normal distribution with mean [tex]$\mu_{Y} _$[/tex] and common variance [tex]$\sigma^2$[/tex] is given by:
[tex]S_{y} ^2 =\frac{1}{n-1}\sum_{i=1}^{n}($Y_i$-$\overline{Y}$)^2[/tex]
where [tex]$Y_i$[/tex] are the individual observations from the sample, and [tex]$\overline{Y}$[/tex] is the sample mean.
Provided that both samples have normal distributions with the same variance [tex]$\sigma^2$[/tex], the ratio of sample variances [tex]\frac{Sx^2}{Sy^2}[/tex] follows an F-distribution with degrees of freedom [tex]m-1$ and $n-1$[/tex], respectively.
Thus,
[tex]\frac{S_x^2}{S_y^2} $\sim$ $F(m-1,n-1)$[/tex]
where [tex]$\sim$[/tex] denotes "follows the distribution of"
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6. Katya and Alyse are sewing a border with
yarn on a rectangular blanket. The length of the
long side is 6 feet and the short side is 4 feet.
How many feet of yarn will they need?
Answer:
20 feet
Step-by-step explanation:
The border of the blanket refers to the perimeter of the blanket so to find the perimeter of a rectangle all we have to do is add all the sides together 2 long sides and 2 short sides.
perimeter=6+6+4+4=20
How many area codes (ABC) would be possible if all three digits could be any value 0-9?
If all three digits in an area code could be any value from 0-9, there would be 1,000 possible area codes.
How to find the area codes ?An area code is a three-digit code that is used to identify a specific geographic region within a country, usually for the purpose of routing telephone calls. In the United States and Canada, area codes are assigned to specific regions, and each area code is unique.
There are 10 possible values for each digit, so there are a total of 10 x 10 x 10 = 1000 possible combinations.
To see why this is the case, consider the first digit of the area code. There are 10 possible values for the first digit (0-9). For each of these values, there are 10 possible values for the second digit, giving us a total of 10 x 10 = 100 possible combinations for the first two digits.
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[tex]24 = \frac{8}{3} x[/tex]
Answer: x is equal to 9.
Step-by-step explanation: this can be solve by multiplying both sides of the equation by 3/8:
24 = 8/3x
(3/8) * 24 = (3/8) * (8/3x)
9 = x