A. (iv) No the case that P(A ∩ B) = 0.5 is not possible. Since B is contained in the event A ∩ B, it must be the case that P(A ∩ B) ≤ P(B). However, 0.5 > 0.4 violates this requirement. (iv)
B. To find the probability that the selected student has at least one of these two types of cards, we can use the formula:
P(A ∪ B) = P(A) + P(B) - P(A ∩ B)
Substituting the values, we get:
P(A ∪ B) = 0.7 + 0.4 - 0.3 = 0.8
Therefore, the probability that the selected student has at least one of these two types of cards is 0.8.
C. The probability that the selected student has neither type of card can be calculated as the complement of the event that the student has at least one of these two types of cards. Therefore,
P(neither A nor B) = 1 - P(A ∪ B) = 1 - 0.8 = 0.2
D. The event that the selected student has a Visa card but not a MasterCard can be written as A ∩ B'. We can calculate its probability as:
P(A ∩ B') = P(A) - P(A ∩ B) = 0.7 - 0.3 = 0.4
E. To calculate the probability that the selected student has exactly one of the two types of cards, we can use the formula:
P(exactly one of A or B) = P(A ∪ B) - P(A ∩ B)
Substituting the values, we get:
P(exactly one of A or B) = 0.8 - 0.3 = 0.5
Therefore, the probability that the selected student has exactly one of the two types of cards is 0.5.
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Julia has 9 one pound bags of sand each a different color. For a art project she will use 1/8 lb of each bag of sand to create sand art jar. How much sand will be in the jar?
a. 8/9, b. 1/72, c. 1 1/9, d. 1 1/8
Find mangleCHF when mangleBGE = 120°.
mangleCHF = ___°
Answer:
120°
Step-by-step explanation:
AB //CD and EF is transversal. When two parallel lines are cut by a transversal, the alternate exterior angles are congruent.
∠CHF = ∠BGE
= 120°
On the first day it was posted online, a music video got 2000 views. The number of views that the video got on the second day was 2400. On the third day the video got 2880 views and so on.
Write the explicit formula for the number of views on the nth day
Answer: The number of views on the nth day can be represented by the explicit formula:
V(n) = 2000 * 2^(n-1)
where n is the number of the day and V(n) is the number of views on the nth day. The formula uses the formula for exponential growth, where the number of views on each day is double the number of views from the previous day.
Step-by-step explanation:
Solve x2 + 4x + 12 = 0 by completing the square.
(options in attachment)
Answer:
second option
Step-by-step explanation:
x² + 4x + 12 = 0 ( subtract 12 from both sides )
x² + 4x = - 12
to complete the square
add ( half the coefficient of the x- term)² to both sides
x² + 2(2)x + 4 = - 12 + 4
(x + 2)² = - 8 ( take square root of both sides )
x + 2 = ± [tex]\sqrt{-8}[/tex] = ± [tex]\sqrt{4(2)(-1)}[/tex] = ± ([tex]\sqrt{4}[/tex] × [tex]\sqrt{2}[/tex] × [tex]\sqrt{-1}[/tex] ) = ± 2[tex]\sqrt{2}[/tex] i
subtract 2 from both sides
x = - 2 ± 2[tex]\sqrt{2}[/tex] i
then
x = - 2 + 2[tex]\sqrt{2}[/tex] i , x = - 2 - 2[tex]\sqrt{2}[/tex] i
Two fractions are equal. They also have the same denominator. What must be true of the numerators of the fractions? Explain.
Answer: The numerators must be the same for the fractions to be equal.
The denominator of a fraction is the bottom number. Take a look at these two fractions.
¾ & ¾
The numbers at the bottom are the same. If I eat ¾ of an apple and you eat ¾ of an apple, we both eat the same amount.
Now look at these fractions.
⅗ & ¾
They both have the same top number (numerator), but they have different denominators. If I eat ¾ of an apple and you eat ⅗ of an apple, we both do not eat the same amount.
So if both the numerator and denominator are the same they are equal.
This means that the numerators must be the same for the fractions to be equal.
I hope this helps & Good Luck <3 !!!
Given: hypotenuse = 5
adjacent = 3
Find Find opposite =
Answer:
Opposite is = 4
Step-by-step explanation:
Fromthe question Hypotenuse = 5
Adjacent = 3
opposite = ?
Let opposite = x
Hypotenuse² = adjacent² + opposite²
5² = 3² + x²
25 = 9 + x²
25 - 9 = x²
16 = x²
[tex] \sqrt{16} = \sqrt{ {x}^{2} } \\ = \sqrt{16} = x \\ = 4 = x [/tex]
Therefore opposite is = 4.
Calculate the monthly payment and total interest for a loan of $89,000 at 5.7% for 30 years.
Monthly Payment:
Total Interest:
To calculate the monthly payment and total interest for a loan of $89,000 at 5.7% for 30 years, we can use the formula for the monthly payment of a fixed-rate mortgage loan:
P = L[c(1 + c)^n]/[(1 + c)^n - 1]
where P is the monthly payment, L is the loan amount, c is the monthly interest rate (which is the annual interest rate divided by 12), and n is the total number of monthly payments (which is the number of years multiplied by 12).
Plugging in the given values, we have:
L = $89,000
r = 5.7% = 0.057 (monthly interest rate)
n = 30 years * 12 months/year = 360 months
P = ($89,000)[0.057(1 + 0.057)^360]/[(1 + 0.057)^360 - 1]
P = $515.92 (rounded to the nearest cent)
Therefore, the monthly payment is $515.92.
To calculate the total interest, we can subtract the loan amount from the total amount paid over the life of the loan. The total amount paid is equal to the monthly payment times the total number of payments:
Total amount paid = P * n = $515.92 * 360 = $185,731.20
Total interest = Total amount paid - Loan amount = $185,731.20 - $89,000 = $96,731.20
Therefore, the total interest paid over the life of the loan is $96,731.20.
What is the value of x in the equation below? 150 = 35 x
Answer:
x = 30/7 = 4 2/7
Step-by-step explanation:
150 = 35x
35x = 150
x = 150/35
x = 30/7
x = 4 2/7
Answer:
x = 30/7 =4 2/7 or 4.2
Step-by-step explanation:
tell me love brainiest.
what is square root?
Answer:
a number which produces a specified quantity when multiplied by itself
Step-by-step explanation:
The square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 x 3 = 9. The symbol for the square root is "√". So, √9 = 3.
There are two types of square roots: the principal square root and the negative square root. The principal square root is the positive value that, when multiplied by itself, gives the original number. The negative square root is the negative value that, when multiplied by itself, gives the original number. For example, the square roots of 9 are 3 and -3, because both 3 x 3 = 9 and -3 x -3 = 9.
The square root of a number can be approximated using a calculator or can be found using mathematical techniques such as the Newton-Raphson method. The square root of a number can also be expressed as an irrational number, meaning that it cannot be expressed as a fraction of two integers. For example, the square root of 2 is an irrational number that cannot be expressed exactly as a fraction.
The average cost per item, C, of manufacturing a quantity q of cell phones is given by C = (a/q) +b. Find the rate of change of C as q increases. if production increases at a rate of 100 cell phones per week, how fast is the average cost changing?
Answer: The average cost per item is given by the equation C = (a/q) + b. To find the rate of change of C as q increases, we need to take the derivative of this equation with respect to q.
dC/dq = -(a/q^2)
So, the rate of change of C with respect to q is proportional to -1/q^2.
If production increases at a rate of 100 cell phones per week, the rate of change of q is 100. But we need to convert this to units of items per hour or per second, depending on the context.
Let's assume the rate of increase of q is in items per hour. Then the rate of change of C with respect to time t (in hours) is given by:
dC/dt = (dC/dq) * (dq/dt) = (-(a/q^2)) * (100) = -100a/q^2
So, the rate at which the average cost is changing depends on the value of a and q. If we knew the values of a and q, we could calculate the specific rate at which the average cost is changing.
Step-by-step explanation:
Find the volume of the right cone below. Round your answer to the nearest tenth if necessary.
Step-by-step explanation:
the volume of such a cone is
pi×r² × h / 3
r is the radius of the ground circle, h is the straight inner height.
the radius is as always half of the diameter, so in our case
6/2 = 3 units.
so, the volume is
pi×3² × 11 / 3 = pi×9×11/3 = pi×3×11 = 33pi =
= 103.6725576... units³ ≈
≈ 103.7 units³
find the gradients of esm n with respect to w(1) and w(2). (note that you should always consider two possible values of yn).
The variables s, m, n, and y in this question are challenging to interpret without additional context. On the other hand, if y is a constant and s, m, and n are functions of w(1) and w(2)
With regard to w(1), esm's partial derivative is as follows:
Each of these partial derivatives can be calculated using the differentiation chain rule and the variables s, m, n, and y in this question are challenging to interpret without additional context. On the other hand, if y is a constant and s, m, and n are functions of w(1) and w(2):
∂(esm)/∂(w(1)) = yn * exp(-yn * n) * (-m) * 1/(1 + exp(-s)) * exp(s) / (1 + exp(s))^2 * x1
∂(esm)/∂(w(2)) = ∂(esm)/∂(n) * ∂(n)/∂(m) * ∂(m)/∂(s) * ∂(s)/∂(w(2))
∂(esm)/∂(w(2)) = yn * exp(-yn * n) * (-m) * 1/(1 + exp(-s)) * exp(s) / (1 + exp(s))^2 * x2.
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Sample Means will vary from sample to sample even if all the samples are the same sizeand all thes samples are selected from the same population. (hint: think about the mean murder rates from 50 samles taken from 90 cities we looked at in class.)
True or False
Sample Means will vary from sample to sample even if all the samples are identical in size and all these samples are favored from the same population. Thus the statement in the question is true.
The sample means would differ from sample to sample, and a histogram might be used to depict their dispersion. We call this distribution the sample distribution. We refer to it as "sampling" since it is the distribution that results from "sampling" frequently. The size of the samples will determine how variable the sample means are, as bigger samples are more likely to produce estimated means that are more closely aligned with the population's actual mean.
For any given sample, the mean, median, minimum, maximum, or any other statistic may deviate from the population. Here, tools like the t-test may be used to assess if the difference between the sample and the population is statistically significant.
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7. Serena bought a scarf for $16.99 and was charged 7.5% tax on her purchase. Which of the
following was the amount of sales tax that Serena had to pay?
(1) $1.19
(3) $1.36
(2) $1.27
(4) $1.51
Answer:
$1.27
Step-by-step explanation:
We know
The tax is 7.5%
7.5% = 0.075
Which of the following was the sales tax Serena had to pay?
We take
16.99 times 0.075 = $1.27
So, the answer is $1.27
Evaluate using order of operations
3/4+5/6÷2/3
Answer:
2.375
Step-by-step explanation:
Consider a one-sample two-sided z-test for a population proportion. Given that conditions for inference are met, which of the following is closest to the p-value for a test statistic of z=−1.86 ?
Answer: 0.0628
Step-by-step explanation:
The closest answer to the p-value for a test statistic of z = -1.86 is 0.0614.
To calculate the p-value for a one-sample two-sided z-test on a population proportion, we must first calculate the area under the standard normal distribution curve that corresponds to the test statistic z = -1.86.
Because this is a two-sided test, we must find the area of the distribution in both tails that is more extreme than the test statistic. We can do this by using a standard normal distribution table or calculator, or by exploiting the distribution's symmetry.
We can calculate the area to the left of z = -1.86 using a standard normal distribution table or calculator. Because this is a two-sided test, the area in the distribution's right tail is also 0.0307.As a result, the p-value for this test statistic is as follows:
2(0.0307) = 0.0614 p-value
So 0.0614 is the closest answer to the p-value for a test statistic of z = -1.86.
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Peter travels at an average speed of 98km/h for 3 hours.he then travels at an average speed of 105km/h for 2 Hours
Answer:
Assuming that Peter travels at a constant speed, then he would have travelled a total distance of (98 * 3) + (105 * 2) = 531 km.
2/3 divided by 13/ 4
Rework Cantor’s proof from the beginning. This time, however, if the digit under consideration is 4, then make the corresponding digit of M an 8; and if the digit is not 4, make the associated digit of M a 4.
M is not on the list, and thus the list cannot be a complete listing of all real numbers between 0 and 1.
What is inductive reasoning?Inductive reasoning is defined as, tempting judgments by moving from the details to the fact. It's usually determined with inferential reasoning, where you move from known information to precise conclusions.
Here,
Georg Cantor's diagonal argument is proof by contradiction that shows that there are more real numbers than natural numbers. Here's how the proof can be reworked with the given modification:
Suppose that we have a list of all real numbers between 0 and 1, written in decimal form. We will show that this list cannot be a complete listing of all real numbers between 0 and 1.
Let M be a new real number whose decimal expansion is obtained by following the following rule: if the nth digit of the nth number on the list is 4, then the nth digit of M is 8; if the nth digit of the nth number on the list is not 4, then the nth digit of M is 4.
Since each number on the list has a unique decimal expansion, M is a real number between 0 and 1, and its decimal expansion is different from the nth number on the list in the nth digit for all n.
Therefore, M is not on the list, and thus the list cannot be a complete listing of all real numbers between 0 and 1.
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Identify the base: "Automobiles are 97% cleaner than they were 30 years ago
(97x/100) represents the total number of cleaner automobiles.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.
Given is that automobiles are 97% cleaner than they were 30 years ago.
Assume that the total number of automobiles 30 years ago were {x}. Then, the total number of clean automobiles will be -
97% of {x} = 97x/100
Therefore, (97x/100) represents the total number of cleaner automobiles.
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1 in a school test consisting of 10 questions, 5 points are awarded for a correct answer but 3 points are deducted for an incorrect answer. a blank answer scores 0. mike scored a total of 0 and he did not leave all of the answers blank
a) Either 3 or 4 questions did Mike answer correctly.
b) Either 7 or 8 questions did Sheila answer correctly.
What is a equation in math?In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
a) Let mike did x correct
then, incorrect will be (10- x)
The equation is:
Now, 5x + (10 - x) (-3) = 0
=> 5x - 30 + 3x = 0
=> 8x = 30
=> x = 30/8
=> x > 3 and x < 4
b) Let Sheila did y correct
then, incorrect = (10 - y)
Now, 5y + (10 - y) (-3) = 32
=> 5y - 30 + 3y = 32
=> 8y = 62
=> y > 7 and y< 8
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The given question is incomplete, complete question is:
In a school test consisting of 10 questions, 5 points are awarded for a correct answer but 3 points are deducted for an incorrect answer.
A blank answer scores (). Mike scored a total of () and he did not leave all of the answers blank. (a) How many questions did Mike answer correctly? _ _ _ _ _ _ _ _ Sheila scored a total of 32. (b) How many questions did Sheila answer correctly?
. payroll mix-up five paychecks and envelopes are addressed to five different people. the paychecks are randomly inserted into the envelopes. what are the probabilities that (a) exactly one paycheck will be inserted in the correct envelope and (b) at least one paycheck will be inserted in the correct envelope? 43. game show on a game show, you are gi
The probability of exactly one paycheck being in the correct envelope is 1 in 5, while the probability of at least one paycheck being in the correct envelope is 4 in 5.
The probability of exactly one paycheck being in the correct envelope can be calculated by taking the number of possible outcomes where one paycheck is in the correct envelope (1) and dividing it by the total number of possible outcomes (5). This yields a probability of 1 in 5. The probability of at least one paycheck being in the correct envelope is calculated by taking the total number of possible outcomes where at least one paycheck is in the correct envelope (4) and dividing it by the total number of possible outcomes (5). This yields a probability of 4 in 5. Thus, the probability of exactly one paycheck being in the correct envelope is 1 in 5, while the probability of at least one paycheck being in the correct envelope is 4 in 5.
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Katie made a bag of trail mix with1/2 cup of raisins, 3/5 cup of banana chips, and 3/8 cup of peanuts. How much trail mix did she make
So, Katie made 1 19/40 number cups of trail mix.
What is denominator?In mathematics, the denominator is the bottom number in a fraction, and it represents the total number of equal parts into which the whole has been divided. The denominator is written below the numerator, which is the top number in a fraction, and it indicates the number of those equal parts that are being considered or used in the fraction.
given by the question.
To find the total amount of trail mix Katie made, we need to add up the amounts of each ingredient:
1/2 cup of raisins +
3/5 cup of banana chips +
3/8 cup of peanuts
To add these fractions, we need to find a common denominator. The smallest number that all the denominators (2, 5, and 8) divide into evenly is 40. We can convert each fraction to have a denominator of 40:
1/2 cup of raisins = 20/40 cup
3/5 cup of banana chips = 24/40 cup
3/8 cup of peanuts = 15/40 cup
Now we can add them up:
20/40 cup + 24/40 cup + 15/40 cup = 59/40 cup
So, Katie made 59/40 cup of trail mix. However, we can simplify this fraction:
59/40 cup = 1 19/40 cup
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A couple has four children. One child has phenylketonuria (PKU). What is the probability of occurrence of PKU in the second generation?
The answer given question : Is 50%,probability of each child inheriting two copies of the mutated gene is 25%. And the Overall, without additional information about the genetic makeup of the second-generation partners, it is impossible to determine the exact probability of occurrence of PKU in their children.
phenylketonuria (PKU) is an inherited disorder caused by a mutation in a gene that produces an enzyme called phenylalanine hydroxylase. This enzyme is necessary for the breakdown of the amino acid phenylalanine, and without it, phenylalanine can build up to toxic levels in the body, leading to brain damage and other serious health problems.
PKU is an autosomal recessive disorder, which means that a person must inherit two copies of the mutated gene (one from each parent) in order to develop the condition. If only one copy of the mutated gene is inherited, the person is a carrier of the disorder but does not develop PKU.
Given that one of the four children in the first generation has PKU, we can assume that both parents are carriers of the disorder. The probability of each of their children inheriting a single copy of the mutated gene (i.e., becoming carriers like their parents) is 50%, and the probability of each child inheriting two copies of the mutated gene (i.e., developing PKU) is 25%.
The occurrence of PKU in the second generation will depend on the genetic makeup of the partners who have children. If both partners are carriers, there is a 25% chance that each of their children will develop PKU. If one partner is a carrier and the other is not, there is no chance that their children will develop PKU, but each child will have a 50% chance of being a carrier
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A grocer can buy raspberries from a local farmer for $1.04 per pound (lb). Her last raspberry order from the farmer cost $171.08 How many pounds of raspberries did
the grocer order? Round your answer to the nearest tenth if needed
Answer
Duration: 0010:10
f(x) pounds of raspberries from the local farmer
The grocer ordered approximately 164.3 pounds of raspberries from the local farmer. We can round this to the nearest tenth if needed, which would give us an answer of 164.3 pounds.
What is linear equation ?
Linear equation can be defined as equation in which highest degree is one.
Given,
o determine how many pounds of raspberries the grocer ordered, we can use the formula:
Total cost = Price per pound x Number of pounds
We know that the price per pound is $1.04, and the total cost of the last order was $171.08. Let's use "x" to represent the number of pounds of raspberries the grocer ordered:
$171.08 = $1.04 x
To solve for x, we can divide both sides by $1.04:
x = $171.08 / $1.04
x ≈ 164.3
Therefore, The grocer ordered approximately 164.3 pounds of raspberries from the local farmer. We can round this to the nearest tenth if needed, which would give us an answer of 164.3 pounds.
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Let C1be the circle radius 2 centered at the origin, oriented counterclockwise, let C2 be the
center radisus 1 and center at the origin, oriented clockwise and let C= C1 U C2. Use Green’s
theorem to evaluate the line integral H
C(4x2 y3)dx+ ( x3 + y2)dy
Using Green's theorem the line integral H C(4x2 y3)dx+ ( x3 + y2)dy is 70.6858.
Step: 1
Given
[tex]\int\limi {4x2 - y3} \, dx + (x3+y2) dy[/tex]
Formula for Greens theorem
δQ/δx = 3x2
Explanation:
partial derivative w.r.t x i . e y is constant
partial derivative w.r.t y i. e x is constant
power rule of derivative is
d/dx Xn = nXⁿ⁻¹
Step: 2
[tex]\int\limits\int\li {dQ/dy + dP/dx dA} \, dx = \int \int {3(x2+y2)} \, dx[/tex]
Explanation:
in polar coordinates x2 + y2 = r2 and dA = radθ
Step: 3
given
C1 = r1 = 2
C2 = r2 = 1
the limits for r is 1 ≤ r ≤ 2
since it is a circle the limits for θ
0 ≤ θ ≤ 2π
Explanation: Please refer to solution,
now integrate w.rt θ
= 45/4[θ] 2π
= 45/4[2π - 0]
= 45/4(2π)
= 45/2(π)
= 45π/2 ≈ 70.6858.
by greens theorem,
[tex]\int 4x2 y3)dx+ ( x3 + y2)dy \, dx[/tex] is 70.6858.
Green’s theorem is substantially used for the integration of the line combined with a twisted aeroplane . This theorem shows the relationship between a line integral and a face integral. It's related to numerous theorems similar as Gauss theorem, Stokes theorem.
Green’s theorem is used to integrate the derivations in a particular plane. However, it's converted into a face integral or the double integral or vice versa using this theorem, If a line integral is given.
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Combine like terms:
5y - 2+4+3y
Answer:
8y+2
Step-by-step explanation:
5y+3y=8y
-2+4=2
Since it's positive two we add them together.
8y+2
Currencies in U.S. Dollars
giving money to Margaret, h
§ that Tobias exchanged?
- 15.75x = 41.87
+ 15.75x = 41.87
x + 15.75 = 41.87
ur answer and then click Check Answer.
Currency
1 Canadian Dollar
1 British Pound
1 Euro
1 Japanese Yen
1 Brazilian Real
Value in U.S. Dollars
0.7386
1.5395
1.0982
0.0093
0.2547
The correct equation is option (A): 0.7386x - 15.75 = 41.87 equation can be used to find the quantity of Canadian dollars that Tobias exchanged .
What is expression ?
In mathematics, an expression is a combination of numbers, variables, and operations that can be evaluated to obtain a value. An expression can contain constants, variables, and operators such as addition, subtraction, multiplication, division, and exponentiation, as well as functions and parentheses to control the order of operations.
According to the given information :Let x be the quantity of Canadian dollars that Tobias exchanged. According to the problem statement, he received 0.7386 U.S. dollars for each Canadian dollar exchanged, and he gave away $15.75, leaving him with $41.87. We can use this information to set up the equation:
0.7386x - 15.75 = 41.87
Therefore, the correct equation is option (A):
0.7386x - 15.75 = 41.87 equation can be used to find the quantity of Canadian dollars that Tobias exchanged .
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the graph doesn't have 4 quadrants
Answer:
a graph does have 4 quadrants
Step-by-step explanation:
the area (P,P) (P,N) (N,P) (N,N)
Key: P=postive
N=negitive
Thomas is finding the coordinates of the image of a polygon with vertices W(2, 2), X(2, 4), Y(4, 4), and Z(4, 2) after a reflection across the y-axis. Describe his error.
The coordinates of W′X′Y′Z′ are W′(2, –2), X′(2, –4), Y′(4, –4), and Z′(4, –2).
After reflection, Coordinates of W'X'Y'Z' are
W'(-2, 2), X'(-2 , 4), Y' (-4, 4), and Z' (-4, 2)
What is reflection?
A reflection is a mirror image of the shape. An image will reflect through a line, known as the line of reflection. A figure is said to reflect the other figure, and then every point in a figure is equidistant from each corresponding point in another figure. The reflected image should have the same shape and size, but the image faces in the opposite direction.
Given,
Vertices of a polygon WXYZ
W(2, 2), X(2, 4), Y(4, 4), and Z(4, 2)
There is reflection over y-axis
For reflection over y - axis , y=f(-x)
Thomas reflected y coordinate y → -y
but x coordinate should be reflected, then x → -x
W(2, 2) → W'(-2, 2)
X(2, 4) → X'(-2 , 4)
Y(4, 4) → Y' (-4, 4)
Z(4, 2) → Z' (-4, 2)
Hence, W'(-2, 2), X'(-2 , 4), Y' (-4, 4), and Z' (-4, 2) are coordinates of W'X'Y'Z'
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