Answers
The given image is trapezoid and to obtain the image there are two different ways: 1. Plotting the points 2. Transformations
What is trapezoid?
In geometry, a trapezoid is a four-sided polygon that has at least one pair of parallel sides. The parallel sides of a trapezoid are called bases, while the non-parallel sides are called legs.
The image below appears to be a trapezoid with vertices at A(2,2), B(4,5), C(6,5), and D(8,2). There are several ways to obtain this image, but here are two possible methods:
Method 1: Plotting the Points
One way to obtain the image is to plot the points A, B, C, and D on a coordinate plane, and then connect them in the correct order to form the trapezoid. Here are the steps:
Draw a coordinate plane with x and y axes.
Plot the point A at (2,2).
Plot the point B at (4,5).
Plot the point C at (6,5).
Plot the point D at (8,2).
Connect the points A, B, C, and D in the order ABDC to form the trapezoid.
Method 2: Transformations
Another way to obtain the image is to start with a reference trapezoid with known vertices, and then apply a sequence of transformations to obtain the desired trapezoid. Here are the steps:
Start with a reference trapezoid with vertices at (0,0), (2,3), (4,3), and (6,0). This trapezoid has the same shape as the desired trapezoid, but is located in a different position on the coordinate plane.
Translate the reference trapezoid 2 units to the right and 2 units up by adding (2,2) to each vertex. This results in a trapezoid with vertices at (2,2), (4,5), (6,5), and (8,2), which is the desired trapezoid.
(Optional) Rotate or reflect the trapezoid as desired to obtain different orientations or symmetries.
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Related Questions
researchers are studying a population of small plants on an island. before and after a major drought, they dug up a random sample of plants and measured their root length. during the drought, no plant reproduction took place. what can be concluded from the plot below?
Answers
The correct conclusion that can be drawn from the plot is that the plant population had a significantly lower mean root length after the major drought occurred.
Explanation:
A frequency polygon is a graphical representation of a frequency distribution using line segments connected to points that indicate the midpoint of each class interval.
The horizontal axis shows the measurement variable, while the vertical axis shows the number of occurrences of the variable for each bin. The midpoint of each bin is used to represent the distribution of data that falls within that bin's range.
Since the values of adjacent bins overlap, the lines are connected. The points are connected by straight lines in a frequency polygon.
In this case, the conclusion that can be drawn from the plot is that the plant population had a significantly lower mean root length after the major drought occurred.
The peak of the frequency polygon has shifted to the left, indicating that the majority of plants have a shorter root length. The decrease in the mean root length of the plant population is due to the impact of the major drought on the island.
As a result, no plant reproduction took place, indicating a decrease in the plant population.
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how many strings of 6 letters of the english alphabet contain one vowel? exactly two vowels? at least one vowel? at least two vowels? what is number of strings of length n with exactly k vowels?
Answers
Strings of 6 letters of the English alphabet containing one vowel: 2,832,240, exactly two vowels: 2,233,200, at least one vowel: 10,919,736, least two vowels: 8,087,496 and number of strings of length n with exactly k vowels: nCk * 5Ck * 21^(n-k)
There are 26 letters in the English alphabet, out of which 5 are vowels (A, E, I, O, U). To find the number of strings of 6 letters of the English alphabet that contain one vowel, we can choose the position of the vowel in 6C1 ways and fill the remaining positions with any of the 21 consonants in 21C5 ways.
Therefore, the total number of such strings is 6C1 * 21C5 = 2,832,240.
To find the number of strings with exactly two vowels, we can choose the positions of the vowels in 6C2 ways and fill them with any of the 5 vowels in 5C2 ways. We can fill the remaining positions with any of the 21 consonants in 21C4 ways.
Therefore, the total number of such strings is 6C2 * 5C2 * 21C4 = 2,233,200.
To find the number of strings with at least one vowel, we can subtract the number of strings with no vowels from the total number of strings. The number of strings with no vowels is 21^6 (since there are 21 consonants and we can choose any of them for each of the 6 positions).
Therefore, the number of strings with at least one vowel is 26^6 - 21^6 = 10,919,736.
To find the number of strings with at least two vowels, we can subtract the number of strings with one vowel or no vowel from the total number of strings. The number of strings with one vowel is 2,832,240 (as we found earlier) and the number of strings with no vowels is 21^6.
Therefore, the number of strings with at least two vowels is 26^6 - 2,832,240 - 21^6 = 8,087,496.
To find the number of strings of length n with exactly k vowels, we can choose the positions of the k vowels in nCk ways and fill them with any of the 5 vowels in 5Ck ways. We can fill the remaining positions with any of the 21 consonants in 21^(n-k) ways.
Therefore, the total number of such strings is nCk * 5Ck * 21^(n-k).
Hence, the number of strings of 6 letters of the English alphabet containing one vowel is 2,832,240, while the number of strings with exactly two vowels is 2,233,200. The number of strings with at least one vowel is 10,919,736, and the number of strings with at least two vowels is 8,087,496.
Finally, the number of strings of length n with exactly k vowels is nCk * 5Ck * 21^(n-k).
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The three interior angles of a triangle measure z degrees , (x+5)degrees , and (x+25) degrees. Which is the measure of one of the three angles?
Answers
The three interior angles of a triangle measure z degrees , (x+5)degrees , and (x+25) degrees. So, the measure of one of the three angles is x+5.
The sum of the interior angles of a triangle is always 180 degrees.
Therefore, we can write an equation using the given angle measures:
z + (x+5) + (x+25) = 180
Simplifying the equation, we get:
2x + 30 + z = 180
Subtracting 30 and z from both sides, we get:
2x = 150 - z
Dividing both sides by 2, we get:
x = (150 - z) / 2 - 5
So the measure of one of the three angles is x+5, which is:
x + 5 = [(150 - z) / 2 - 5] + 5
x + 5 = (150 - z) / 2
x + 5 = 75 - z/2
Therefore, one of the angles measures (x+5) degrees.
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while shopping, sofia noticed that her favorite bag of chips were on sale for $5 for 2 bags. how much would 7 bags cost?
Answers
Sofia's favorite bag of chips were on sale for $5 for two bags. If she wanted to buy seven bags, the cost would be $17.50.
To calculate this, we need to use the formula for finding the total cost of a given number of items: Total Cost = Number of Items x Cost Per Item.In this case, we need to find the total cost of seven bags, so the equation looks like this: Total Cost = 7 x $5.
We can solve this equation by multiplying the two numbers together. 7 multiplied by 5 equals 35. However, the question is asking us to find the total cost of seven bags, which is $17.50. To convert the answer from 35 to 17.50, we need to divide 35 by two: 35 divided by 2 equals 17.50.
Therefore, the cost of seven bags of Sofia's favorite chips would be $17.50.
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An Adult membership fee is £120
A Junior membership fee is 1/5
of the Adult fee.
Work out the total membership fee for 2 Adults and 3 Juniors.
Answers
Step-by-step explanation:
The membership fee for one Adult is £120, and the membership fee for one Junior is 1/5 of the Adult fee, which is:
1/5 x £120 = £24
So the total membership fee for 2 Adults and 3 Juniors is:
2 x £120 + 3 x £24
= £240 + £72
= £312
Therefore, the total membership fee for 2 Adults and 3 Juniors is £312.
leave a comment
1/3750 as a percetage
Answers
(1*100):3750 =
100:3750 = 0.03
Answer: 37.5
Step-by-step explanation:
the graph of a certain geometric sequence can be described as a curve increasing from left to right. which sequence would have a similar graph?
Answers
The graph of a certain geometric sequence can be described as a curve increasing from left to right. A sequence that would have a similar graph is the geometric sequence whose common ratio is less than 1.
A geometric sequence is defined as a sequence of numbers where each number is the product of the previous number and a fixed constant. The fixed constant is known as the common ratio, and it is denoted by r.The nth term of a geometric sequence is given by the formula an= ar^(n-1) where a is the first term and r is the common ratio of the sequence.
Similar graphIn a similar graph, the shape of the graph is the same, but the size may be different. Thus, the sequence that would have a similar graph to the given sequence is a geometric sequence whose common ratio is less than 1 because in such a sequence, the successive terms will be smaller than the previous term.This means that as we move from left to right, the values will gradually decrease in size, and the graph will look like a curve increasing from left to right.
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For a t-distribution with sample size 10, P (t > 1.96) 2 0.0408 and P (t < -1.96) 2 0.0408 . Which of the following is a property of the t-distribution illustrated by the probabilities? A. With sample size 10, the tails of the curve of the t-distribution have more area than the tails of the curve of the z-distribution. B. With sample size 10, the tails of the curve of the t-distribution have less area than the tails of the curve of the z-distribution. C. With sample size 10, the middle of the curve of the t-distribution has more area than the middle of the curve of the z-distribution. With sample size 10, the mean of the t-distribution is greater than the mean of the z-distribution. E. With sample size 10, the mean of the t-distribution is less than the mean of the z-distribution.
Answers
The correct option is A) With sample size 10, the tails of the curve of the t-distribution have more area than the tails of the curve of the z-distribution.
Explanation:Given:P(t > 1.96) = 0.0408P(t < -1.96) = 0.0408The t-distribution is different from the z-distribution because it has a thicker tail.The tail is thicker since the t-distribution is determined by the sample size, whereas the z-distribution is determined by the population size (the t-distribution is estimated with the standard error of the mean in this case).
A t-distribution with small degrees of freedom has a much thicker tail than a z-distribution with the same degrees of freedom. Because sample size is related to the degrees of freedom, it makes sense that t-distributions with smaller sample sizes will have thicker tails.
The population variance is replaced with the sample variance in the estimation of the t-distribution. As a result, the t-distribution has heavier tails than the z-distribution.
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y=14-3x domain (-6,5,13)
Answers
Answer:
y = {18 x + 14, 14 - 15 x, 14 - 39 x}
Step-by-step explanation:
There is zero context to this, so I have no clue if this helps or even answers your question. Try harder with the question next time.
Simplify this Please!!!!!
Answers
Answer: 4/9 ≅ 0.4444444 = four ninths. ... Then simplify the result to the lowest terms or a mixed number.
Can someone help me with this aleks
Answers
The Perimeter of the parallelogram whose vertices are given by the coordinates (3 ,6), (-5, 6), (6, -1), (-2, -1) is: 16 + 2√(58)
What is the explanation for the above response?To find the perimeter of the parallelogram, we need to find the distance between each pair of adjacent vertices and add them up.
First, let's find the distance between (3, 6) and (-5, 6). This is simply the difference between their x-coordinates, which is 3 - (-5) = 8.
Next, let's find the distance between (-5, 6) and (-2, -1). To do this, we need to find the difference between their x-coordinates and their y-coordinates, and then use the Pythagorean theorem. The difference in x-coordinates is -5 - (-2) = -3, and the difference in y-coordinates is 6 - (-1) = 7. So the distance between these two points is √((-3)^2 + 7^2) = √(58).
We can use the same method to find the distance between (6, -1) and (3, 6), which is also √(58).
Finally, we need to find the distance between (6, -1) and (-2, -1), which is simply the difference between their x-coordinates, which is 6 - (-2) = 8.
Adding up all these distances, we get 8 + √(58) + √(58) + 8 = 16 + 2√(58).
So the exact perimeter of the parallelogram is 16 + 2√(58)
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Kylie needs to pack her baton for a color-guard competition. The baton is 11 inches long. She has a rectangular box with a base of 6 inches by 8 inches and a height of 6 inches.
PART A: Could the baton lie flat on a diagonal along the base of the box? Explain.
PART B: Could the baton fit along the interior diagonal of the box? Explain.
Answers
Step-by-step explanation:
PART A:
No, the baton cannot lie flat on a diagonal along the base of the box. The diagonal of the base can be found using the Pythagorean theorem as follows:
d = sqrt(6^2 + 8^2)
d = sqrt(36 + 64)
d = sqrt(100)
d = 10
The diagonal of the base is 10 inches, which is less than the length of the baton (11 inches). Therefore, the baton cannot lie flat on the diagonal of the base.
PART B:
Yes, the baton could fit along the interior diagonal of the box. The interior diagonal can be found using the Pythagorean theorem as follows:
d = sqrt(6^2 + 8^2 + 6^2)
d = sqrt(36 + 64 + 36)
d = sqrt(136)
d ≈ 11.66
The interior diagonal of the box is approximately 11.66 inches, which is greater than the length of the baton (11 inches). Therefore, the baton could fit along the interior diagonal of the box.
A total of 646 tickets were sold for the school play. They were either adult tickets or student tickets. There were 54 fewer student tickets sold than adult tickets. How many adult tickets were sold?
Answers
Answer:
64 im pretty cxsure
Step-by-step explanation:
Jenny makes bracelets using circular beads. She measures a bead and finds that it has a diameter of 6 millimeters. Which measurement is closest to the area of the bead in square millimeters?
Answers
From the given information provided, the measurement of the area of the beads jenny used is 28mm².
The area of a circle is given by the formula A = πr², where r is the radius of the circle. Since the diameter of the bead is 6 millimeters, the radius is half of that, which is 3 millimeters.
Substituting r = 3 mm into the formula, we get:
A = π(3 mm)²
A = π(9 mm²)
A = 28.27 mm²
Rounding this to the nearest whole number, we get:
A = 28 mm²
Therefore, the measurement closest to the area of the bead in square millimeters is 28 mm².
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Duri wants their backpack to weigh less than 45 pounds.
Use w to represent weights where Duri can carry their backpack.
Answers
This inequality represents that the weight of Duri's backpack is w < 45
How to represent the backpack as an expressionGiven that
Weight = Less than 45 pounds
We can use the inequality symbol to represent Duri's weight limit as follows:
w < 45
This inequality states that the weight of Duri's backpack, represented by w, must be less than 45 pounds.
Any weight value for w that satisfies this inequality is within Duri's weight limit and can be carried in their backpack.
For example, if Duri's backpack weighs 30 pounds, then w = 30 satisfies the inequality w < 45, so Duri can carry this weight.
However, if the backpack weighs 50 pounds, then w = 50 does not satisfy the inequality w < 45, so Duri cannot carry this weight.
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what is the answer for 239.3 x 55
Answers
Answer:
13,161.5
Step-by-step explanation:
5x3= 15 then go over and carry the one then do 5x9= 45+1= 46 then go over to 3 and carry the four and 5x3= 15+4= 19 put 9 down and carry the one then 5x3= 10+1= 11 after x the 0 the repeat what you did and add up the final numbers so 239.5x 55= 13161.5
the admission fee at an amusement park is $4.25 for children and $7.00 for adults. on a certain day, 303 people entered the park, and the admission fees collected totaled 1824 dollars. how many children and how many adults were admitted?
Answers
The admission fee at an amusement park is $4.25 for children and $7.00 for adults. on a certain day, 303 people entered the park, and the admission fees collected totaled 1824 dollars. There are 108 children and 195 adults were admitted
Let the number of children admitted = C and the number of adults admitted = A
Total number of people admitted = 303
We can form two equations from the given information.
The first equation is to represent the number of people admitted in terms of children and adults.
So, the equation will be
C + A = 303 ------(1)
The second equation represents the total amount collected from admission fees.
So, the equation will be
4.25C + 7A = 1824 ------(2)
Multiplying equation (1) by 4.25, we get
4.25C + 4.25A = 1289.25 ------(3)
Subtracting equation (3) from equation (2), we get:
7A - 4.25A = 1824 - 1289.25
Simplifying, we get:
2.75A = 534.75
Dividing by 2.75, we get:
A = 195
Putting A = 195 in equation (1), we get:
C + 195 = 303
Simplifying, we get:
C = 108
So, there were 108 children and 195 adults admitted on that day.
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1-0.004326suppose it is believed that the probability a patient will recover from a disease following medication is 0.8. in a group of ten such patients, the number who recover would have mean and variance respectively given by (to one decimal place):
Answers
The mean number of patients who recover is 8, and the variance is 1.6.
This scenario follows a binomial distribution, where the number of patients who recover from the disease out of a sample of ten patients follows a binomial distribution with parameters n = 10 (sample size) and p = 0.8 (probability of success).
The mean (μ) and variance (σ^2) of a binomial distribution are given by
μ = np
Substitute the values in the equation
= 10 x 0.8
Multiply the numbers
= 8
σ^2 = np(1-p)
Substitute the values in the equation
= 10 x 0.8 x (1-0.8)
= 1.6
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z score of 0.28 and corresponding z score
Answers
Step-by-step explanation:
Mathematics for Social Science 1011 PDF
What is -10 + +10 please help
Answers
Answer:
0
-10++10=0
+10 can be rewritten as 10
-10+10=0
:)
n/45 = 1/15 Please select the best answer from the choices provided
a. n= 1/3
b. n= 4
c. n= 675
d. n= 3
Answers
Reasoning:
1) n/45 = 1/15
2) multiple both sides by 45
3) n = 45/15
4) n= 3
Ethan is older than Jordan. Their ages are consecutive integers. Find Ethan’s age if the sum of the square of Ethan’s age is 4 times Jordan’s age is 56.
Answers
If the square of Ethan's age is added to Jordan's age, the result is [tex]56[/tex], which equals Ethan's age. The answer is that Ethan is [tex]6[/tex] years old.
How can you calculate age using maths?A person's birth date is compared to the day on which their age has to be computed as part of the age calculation process. The age of the individual is calculated by subtracting the person's age from the given date. Provided Date - Birthdate is used to compute age.
How can ageing be quantified?A person's age is merely a measurement of how long they have been living. These metrics don't adequately describe who you are or what you have accomplished. At any age, either old or young, one may do anything.
The solution states that [tex]56[/tex] is equal to [tex]4[/tex] times Jordan's age multiplied by the square of Ethan's age. This may be expressed as an equation:
[tex]x^2 + 4(x-1) = 56[/tex]
Simplifying the equation:
[tex]x^2 + 4x - 4 = 56[/tex]
[tex]x^2 + 4x - 60 = 0[/tex]
We can solve this quadratic equation by factoring:
(x+10)(x-6) = 0
Therefore, [tex]x = -10[/tex] or [tex]x = 6[/tex]. We can discard the negative value since age cannot be negative, so Ethan's age is [tex]6[/tex].
To check, we can substitute x=6 into the original equation:
[tex]6^2 + 4(6-1) = 36 + 20 = 56[/tex]
So the solution is Ethan is [tex]6[/tex] years old.
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Please help I’ve been stuck on this for daysss
Answers
Therefore , the solution of the given problem of graphs comes out to be a = [P² * G * Ms / [tex](4\pi ^2* Mp)]^(1/3)[/tex]
Explain graph.Graphs are used by theoretical coordinate points physicists to analytically and graphically present assertions rather than values. Typically, a graph point shows the relationship between several distinct objects. A graph is a particular kind of pas de container construction composed of groups and lines. The borders, also known as the channels, should be joined with glue.
Here,
According to Kepler's third law, one can determine the connection between a planet's orbital period and its separation from a star by:
=> P² = (4π² / GM) * a³
where P denotes the orbit's duration in years, a denotes the semi-major axis in astronomical units (AU), G denotes gravity's constant, and M denotes the star's mass in solar masses.
If we rewrite this equation, we obtain:
=> a = [P² * G * Ms / [tex](4\pi ^2* Mp)]^(1/3)[/tex]
We can rewrite this equation as follows since our goal is to estimate the distance from the sun in AU based on the mass of the planet in relation to the sun:
=> a = [P² * G * Ms / [tex](4\pi ^2* Mp)]^(1/3)[/tex]
where Mp is the mass of the planet in relation to the sun and Ms is the mass of the sun.
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a dependent variable that maintains constant measurements throughout an experiment will be depicted by a
Answers
A dependent variable that maintains constant measurements throughout an experiment will be depicted by a straight, horizontal line in a graph.
In an experiment, the dependent variable is the variable being measured, and it is expected to change in response to changes in the independent variable. However, if the dependent variable remains constant throughout the experiment, it indicates that it is not affected by the independent variable.
When such a situation arises, the data points for the dependent variable will be located at the same level or value, resulting in a horizontal line in the graph.
This straight, horizontal line represents the constant measurements of the dependent variable, and it can provide valuable insights into the nature of the relationship between the independent variable and the dependent variable.
A dependent variable that maintains constant measurements throughout an experiment may indicate a flaw in the experimental design, such as an incorrect assumption about the nature of the relationship between the independent variable and the dependent variable, or an uncontrolled confounding variable.
Therefore, it is important to carefully analyze the data and the experimental design to identify and address any potential issues.
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Perform the indicated operation. X/x+1- 1/1-1+ 2x/x2-1
Answers
the simplified expression is: (X*(2x - 1) - 1)/(2x*(x+1))
The given expression is:
X/(x+1) - 1/(1-1+2x) = X/(x+1) - 1/(2x)
To simplify this expression, we need to find a common denominator. The denominator of the first term is (x+1) and the denominator of the second term is 2x. To get a common denominator, we can multiply the first term by 2x and the second term by (x+1).
So, the expression becomes:
(2xX)/[(x+1)2x] - (1(x+1))/[(1-1+2x)(x+1)]
Simplifying further, we get:
(2xX - (x+1))/(2x(x+1))
Now, we can simplify the numerator by distributing the X term and combining like terms:
(2xX - x - 1)/(2x(x+1))
We can factor out an X from the numerator:
(X*(2x - 1) - 1)/(2x*(x+1))
Therefore, the simplified expression is:
(X*(2x - 1) - 1)/(2x*(x+1))
In summary, the given expression is simplified by finding a common denominator and then simplifying the resulting expression by distributing and factoring. The final expression is the simplified form of the given expression.
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Please help
The answer is 167
i need to explain this to my class
this is 20% of my grade
Answers
The solution for the last equation: 2y + 2z * 2z x is 167 where a slice of watermelon is x, a grape is y, and one apple is z.
How do we solve this?Let a slice of watermelon be x
Let one grape be y
Let one apple be z
2x + 4y + 2x = 30
4x + 4y = 30 ----- (1)
x + x + 2z = 28
2x + 2z = 28 --- (2)
4y + 2y + z = 31
6y + z = 31 ----(3)
Solving simultaneously for x, y, and z:
4x + 4y = 30 ----- (1)
2x + 2z = 28 --- (2)
6y + z = 31 ----(3)
We can simplify equation (1) by dividing both sides by 4, which gives:
x + y = 7.5 ----- (1')
We can simplify equation (2) by dividing both sides by 2, which gives:
x + z = 14 ----- (2')
We can use equation (1') to solve for y in terms of x:
y = 7.5 - x ----- (4)
We can use equation (2') to solve for z in terms of x:
z = 14 - x ----- (5)
Now we can substitute equations (4) and (5) into equation (3) to solve for x:
6(7.5 - x) + (14 - x) = 31
45 - 6x + 14 - x = 31
59 - 7x = 31
-7x = -28
x = 4
Now we can use equation (4) to solve for y:
y = 7.5 - x = 7.5 - 4
y = 3.5
And we can use equation (5) to solve for z:
z = 14 - x = 14 - 4
z = 10
Solving for the last equation: 2y + 2z * 2x
2 * 3.5 + 2 * 10 * 2 * 4 = = 167
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The annual rainfall for Austin, Texas, and San Antonio, Texas, in each of the years from 2002 to 2011 are shown in the tables. Use the data for 9-it.' Annual Rainfall for Austin, Texas (in.) 36.00 21.41 52.27 22.33 34.70 46.95 16.07 31.38 37.76 19,68 Annual Rainfall for San Antonio, Texas (in.) 46.27 28,45 45.32 16.54 21.34 47.25 13.76 30.69 37.39 1759 9. Use a spreadsheet to find the mean for the two cities' annual rainfalls. In which city does it rain more in a year, on average?
Answers
In San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas according to the mean of both cities.
Data of Austin, Texas is as follows:
36.00, 21.41, 52.27, 22.33, 34.70, 46.95, 16.07, 31.38, 37.76 and 19.68.
Number of values ( n ) = 10
Sum of the values = 318.23
Average of the rainfall in Austin, Texas is equal to:
Mean = Total sum / No. of Values
Mean = 318.23 / 10
Mean = 31.82 in
Data of San Antonio, Texas is as follows:
46.27, 28.45, 45.32, 16.54, 21.34, 47.25, 13.76, 30.69, 37.39 and 17.59.
Number of values ( n ) = 10
Sum of the values = 304.6
Average of the rainfall in San Antonio, Texas is equal to:
Mean = Total sum / No. of Values
Mean = 304.6 / 10
Mean = 30.46 in
So, comparatively the average of San Antonio is higher.
Therefore in San Antonio, Texas it rain more in a year, on average when compared to Austin, Texas.
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Please help!!! I only have a few minutes left!! I've given screenshots of everything
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The solution to the system of equations is: x = 1/2 and y = 4. The steps and justification are given below.
How to Solve a System of Equations?Given the equations, -4x + y = 2 and 4x + y = 6, the following shows the justification for each step taken to solve the system.
Step Justification
1. 2y = 8 1. Add the equations
2. y = 4 2. Divide each side by 2
3. 4x + y = 6 3. Write equation 2
4. 4x + (4) = 6 4. Substitute 4 for y
5. 4x = 2 5. Subtract 4 from each side
6. x = 1/2 6. Divide each side by 4
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interpreting a z score from a sample proportion. suppose that you conduct a hypothesis test about a population proportion and calculate the z score to be 0.47. which of the following is the best interpretation of this value? for the problems which are not a good interpretation, indicate the statistical idea being described. a. the probability is 0.47 that the null hypothesis is true. this is not a good interpretation of for the z score what we are computing is the p() b. if the null hypothesis were true, the probability would be 0.47 of obtaining a sample proportion as far as observed from the hypothesized value of the population proportion. c. the sample proportion is 0.47 standard errors greater than the hypothesized value of the population proportion. d. the sample proportion is equal to 0.47 times the standard error. e. the sample proportion is 0.47 away from the hypothesized value of the population. f. the sample proportion is 0.47
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The best interpretation of the z score of 0. 47 from the sample proportion is C. The sample proportion is 0.47 standard errors greater than the hypothesized value of the population proportion.
What does the z - score represent ?The z-score, also known as the standard score, represents the number of standard deviations a data point or observation is away from the mean of a distribution.
A sample proportion with a z-score of 0.47 can be best understood as the sample proportion is 0.47 standard errors higher than the population proportion's estimated value.
This means that the observed sample proportion is 0.47 standard deviations above the hypothesized population proportion under the null hypothesis.
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Kalakaua Middle School is doing a fundraiser by selling Popsicles and Kona Ice. Each Popsicle costs $2 and each Kona Ice costs $4. The school sold a total of $160 from the
fundraiser. It sold a total of 50 Kona Ice and Popsicles combined. How many Kona Ice were sold and how many Popsicles were sold?
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Therefore, the school sold 20 Popsicles and 30 Kona Ice.
What is system of equation?A system of equations is a set of two or more equations that are to be solved simultaneously. The variables in the equations are related to each other in such a way that they must satisfy all the equations in the system.
Given by the question.
Let's assume that the number of Popsicles sold is "x" and the number of Kona Ice sold is "y".
From the problem, we know that each Popsicle costs $2 and each Kona Ice costs $4, and the total amount sold is $160. Therefore, we can write two equations based on the given information:
2x + 4y = 160 (equation 1)
x + y = 50 (equation 2)
We can solve this system of equations by substitution or elimination. Let's use substitution:
From equation 2, we can solve for "x" in terms of "y":
x = 50 - y
Substituting this expression for "x" into equation 1, we get:
2(50 - y) + 4y = 160
Simplifying and solving for "y", we get:
100 - 2y + 4y = 160
2y = 60
y = 30
So, the number of Kona Ice sold is 30.
Substituting this value of "y" back into equation 2, we get:
x + 30 = 50
x = 20
So, the number of Popsicles sold is 20.
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