Answers
Answer: I believe it is reflected over the y-axis.
Step-by-step explanation:
Always look for the dum (I know it is spelled wrong but Brainly won't let me type it) and dummer answer choices. The other two choices aren't even a type of transformation. Think about it. If you are reflecting over the y-axis, the y-values stay the same and the x-values change.
Related Questions
Help me find the measure of m
Answers
The values of the angles for the given figure are m ∠M=76°,
m ∠N=76°.
What is meant by an angle?An angle is a figure in Euclidean geometry made up of two rays that share a terminal and are referred to as the angle's sides and vertices, respectively. Angles created by two rays are located in the plane where the rays are located. The meeting of two planes can also create an angle. These are referred to as dihedral angles. The angle formed by the rays lying perpendicular to the two intersecting curves at their point of intersection can likewise be used to establish an angle between two intersecting curves.
Given,
In ΔLMN,
m ∠L=28°
As we know that,
Angle sum in a triangle=180°
m ∠L+ m ∠M+ m ∠N=180°
From the figure,
m ∠M= m ∠N
So, m ∠L+ m ∠M+ m ∠M=180°
28°+ 2 m ∠M=180°
2 m ∠M=180°-28°
2 m ∠M=152°
m ∠M=76°
So, m ∠N=76°
Therefore, the values of the angles for the given figure are m ∠M=76°,
m ∠N=76°.
To know more about angle, visit:
https://brainly.com/question/17039091
#SPJ1
A suit is being sold for 194.49, discount is 73% from the original price.
What’s the original price?
Answers
The original price is $720.33 .
What is original price ?
Convert the percent discount to a decimal by dividing by 100% . Step 2: Set up the equation P=(1−d)x P = ( 1 − d ) x to find the original price of the item where P is the sale price, d is the discount as a decimal, and x is the original price of the item.You need to be aware of the selling price as well as the discount % in order to determine the item's original cost. The calculations contain a straightforward method that divides the sale price by the percentage-based result of 1 minus the discount. To determine an item's original or list price, use this formula.
SInce $194.49, is what is owed after the discount you will want to subtract 73 from 100 to get the percent of what is owed. Then you will set it up like a percent equation. 27/100 = 194.49/X where X = the original price. You will then multiply 194.49 by 100 and divide that answer by 1.9449. This equals $720.33 as the original price.
To learn more about original price visit:https://brainly.com/question/731526
#SPJ1
Which equation can be used to find d, the number of dollar coins Giuliana has?
Answers
The equation of the number of dollar cins giuliana has, is found to be
0.25(22 – d) + d = 10.75.
What is an equation?An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
Given that Giuliana has 22, quarters and dollar coins worth a total of $10.75.
Let the number of dollar coins be represented by d, while the number of quarter coins be represented by (22-d). Therefore, the sum of the total amount that is with Giuliana can be written as,
(1 x d) + (0.25 x (22-d)) = 10.75
d + 0.25(22-d) = 10.75
Hence, the equation can be used to find d, the number of dollar coins Giuliana has is 0.25d + 22 – d = 10.75.
Learn more about equations here;
https://brainly.com/question/22688504
#SPJ1
NEED HELP! 50 POINTS!
If you move the quadratic parent function, f(x) = x2, left 3 units, what is the equation of the new function?
g(x) = x2 - 3
g(x) = (x - 3)2
g(x) = (x + 3)2
g(x) = 3x2
Answers
Answer: [tex]g(x)=(x+3)^2[/tex]
Step-by-step explanation:
When shifting a function left [tex]3[/tex] units, [tex]f(x) \to f(x+3)[/tex].
Therefore, [tex]g(x)=(x+3)^2[/tex].
Find the measure of angle A
Answers
75+x+53+x+68=180
Now we can simplify
2x+196=180
Subtract 196 from both sides
2x=-16
Divide each sides by 2
x=-8
Now since angle A is x+53, we have to add 53 to -8
53+(-8)=45
53+(-8) is the same as subtracting 8 from 53 which is 45
So angle A=45
Answer:
45°
Step-by-step explanation:
Simplify (28x102)-(69x10 Write the final answer in scientific notation
6.62x10-9
6.62x10-8
41x10
41x10
Answers
To simplify this expression, we need to first understand the rules of scientific notation. In scientific notation, a number is written in the form a x 10^b, where a is a number between 1 and 10, and b is an integer (positive, negative, or zero).
To simplify this expression, we need to first convert the numbers 28 and 69 to scientific notation. We do this by moving the decimal point so that the number is between 1 and 10, and then multiplying or dividing by a power of 10 to make the number have the same value as before. For example, we can convert 28 to scientific notation by moving the decimal point two places to the left, resulting in 2.8, and then multiplying by 100 to compensate for the decimal point movement, resulting in 2.8 x 10^2. Similarly, we can convert 69 to scientific notation by moving the decimal point one place to the left, resulting in 6.9, and then multiplying by 10 to compensate for the decimal point movement, resulting in 6.9 x 10^1.
With the numbers in scientific notation, we can now simplify the expression. To do this, we need to remember the rules of exponents. In particular, when multiplying numbers with the same base, we add the exponents, and when dividing numbers with the same base, we subtract the exponents. In this case, we have two numbers with the same base (10) and we are dividing them, so we subtract the exponents. This gives us:
(28 x 102) - (69 x 101)
= 2.8 x 10^2 - 6.9 x 10^1
= 2.8 x 10^1 - 6.9 x 10^0
= 28 x 10^1 - 6.9 x 10^0
= 28 x 10^0 - 6.9 x 10^-1
= 28 x 1 - 6.9 x 0.1
= 28 - 0.69
= 27.31
We can now convert this result to scientific notation. To do this, we move the decimal point so that the number is between 1 and 10, and then multiply or divide by a power of 10 to make the number have the same value as before. In this case, we can move the decimal point two places to the right, resulting in 0.0273, and then multiplying by 100 to compensate for the decimal point movement, resulting in 2.73 x 10^-2. However, since the exponent is negative, this means the number is very small, so we can simplify it further by moving the decimal point one more place to the right, resulting in 0.00273, and then multiplying by 10 to compensate for the decimal point movement, resulting in 2.73 x 10^-3. However, since the exponent is still negative, this means the number is even smaller, so we can simplify it further by moving the decimal point one more place to the right, resulting in 0.000273, and then multiplying by 10 to compensate for the decimal point movement, resulting in 2.73 x 10^-4. Since the exponent is now a multiple of 3 (which is a common factor of 10), we can simplify it further by dividing the exponent by 3, resulting in 2.73 x 10^-4 / 3 = 0.9 x 10^-4. Finally, we can move the decimal point one more place to the right, resulting in 0.09 x 10^-4, and then multiplying by 10 to compensate for the decimal point movement, resulting in 9 x 10^-5. This is the final result, which is in scientific notation
Find f(1), f(2), f(3), f(4), and f(5) if fen) i defined recurively by f(O) = 3 and for n 0,1,2,. A) fen I) = -2f(n). B) fen I) = 3f(n) 7. C) fen I) = f(n)2 2f(n) 2. D) fen 1) = )f(n)/3
Answers
Given recursion function in options we have calculated values of f(1),f(2),f(3),f(4),f(5).
Find f(1), f(2), f(3), f(4), f(5) if f(0) = 3.
First recursive Function is given as
a) f(n+1) = -2*f(n)
f(1) = -2*f(0) = -2*3 = -6
f(2) = -2*f(1) = -2*(-6) = 12
f(3) = -2*f(2) = -2*12 = -24
f(4) = -2*f(1) = -2*(-24) = 48
f(5) = -2*f(4) = -2*(48) = -96
Second recursive Function is given as
b) f(n+1) = 3*f(n)+7
f(1) = 3*f(0)+7 = 3*3+7 = 16
f(2) = 3*f(1)+7 = 3*16+7= 55
f(3) = 3*f(2)+7 = 3*55+7 = 172
f(4) = 3*f(3)+7 = 3*172+7 = 523
f(5) = 3*f(4)+7 = 3*523+7 = 1576
Third recursive Function is given as
c) f(n+1) = [tex]f(n)^2-2*f(n)-2[/tex]
f(1) = f(0)*f(0)-2*f(0)-2 =3*3 - 2*3 - 2 = 1
f(2) = f(1)*f(1) - 2*f(1) - 2 = 1*1 - 2*1 - 2 = -3
f(3) = f(2)*f(2) -2*f(2)- 2 =-3*(-3) - 2*(-3) - 2 = 13
f(4) = f(3)*f(3) -2*f(3)- 2 = 13*13 - 2*13 - 2 = 141
f(5) = f(4)*f(4) -2*f(4)-2 = 141*141 - 2*141 - 2 = 19597
Fourth recursive Function is given as
d) f(n+1) = [tex]3^(f(n)/3)[/tex]
f(1) = 3^((f(0)/3) = 3^1 = 3
f(2) = 3^((f(1)/3) = 3^1 = 3
f(3) = 3^((f(2)/3) = 3^1 = 3
f(4) = 3^((f(3)/3) = 3^1 = 3
f(5) = 3^((f(4)/3) = 3^1 = 3
To know more about recursive function here
https://brainly.com/question/23896867
#SPJ4
A school is arranging a field trip to the zoo. The school spends 746.34 dollars on passes for 40 students and 2 teachers. The school also spends 352.40 dollars on lunch for just the students. How much money was spent on a pass and lunch for each student?
Answers
Each pass costs $17.77 and each student's lunch costs $8.81
What is Unitary Method?The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.
For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.
12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.
As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.
This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.
Given:
The school spends 746.34 dollars on passes for 40 students and 2 teachers.
So, Each pass costs = 746. 34/ 42 = $17.77
Now, The school also spends 352.40 dollars on lunch for just the students.
= 352.40/ 40
= $8.81
Hence, Each pass costs $17.77 and each student's lunch costs $8.81
Learn more about Unitary Method here:
https://brainly.com/question/22056199
#SPJ1
Graph y=2x-3-5. Algebra 2 connection unit 2 test
Answers
Answer: Slope: 2, y-intercept: (0,-8)
Step-by-step explanation:
x | y
0 -8
1 -6
Predict the cost of a meal for a family of four between $55 and $100. Be sure to include dollars and cents.
Part A: If the family has a 15% off coupon, calculate the new price of the meal. Show all work or explain your steps. (6 points)
Part B: Calculate a 22% tip using the new price. What is the final cost of the meal? Show all work or explain your steps. (6 points)
Answers
The final cost is lie between the amount $46.00 and $92.00.
What is an equation?
When two expressions are connected with both the equals sign (=) in a mathematical formula, it expresses this same equality of the two expressions. The meanings of the word equation as well as its cognates in those other languages can vary slightly. For instance, an equation in French is defined as having one or maybe more variables, whereas in English, an equation is any properly formed formula that consists of two expressions linked by the equals sign.
The coupon is given = 15% off
New price = Cost of meal (1 - coupon)
Now Substitute the known values in the equation;
New price = between 55(1 - 15%) and 100.00 (1 - 15%)
Evaluate;
The final cost of the meal is between $40.00 and $80.00
Tip = 22%
Thus Final cost = New price (1 + tip)
Now Substitute the known values in the equation
Final cost = Between 40.00 (1 + 22%) and 80.00 (1 + 22%)
The Final cost is Between $46.00 and $92.00
Hence, the final cost is lie between the amount $46.00 and $92.00
Read more about discounts at;
https://brainly.com/question/1548141
#SPJ1
what is the solution to the problem expressed to the correct number of significant figures? 2.13 1
Answers
The solution to the problem expressed to the correct number of significant figures is, 2.13 + 1 = 3
Given that,
The solution to the problem expressed to the correct number of significant figures,
2.13 + 1 = ?
Unit is a quantity of constant magnitude which is used to measure the magnitudes of other quantities of the same manner.
Unit can be defined as the rightmost position in a number or the one's place. Here, 3 is the unit's number in the number 6713. A unit may also mean the standard units used for measurement.
You must round your answer to the same "place" when adding values as the measurement with the last significant figure that is farthest to the left.
= 2.13
= +1
= 3.13
The “1” has its last significant figure furthest to the left, so you round off the number to the “units" place. That's the last column that the measurements share.
3.13 → 3 (rounded to the "units" place)
Therefore,
The solution to the problem expressed to the correct number of significant figures is, 2.13 + 1 = 3
To learn more about Units visit :
brainly.com/question/12214906
#SPJ4
Apply the 30°-60°-90° Triangle Theorem to find the length of the longer leg of a triangle if the length of the shorter leg is 5√3 inches.
Answers
Answer:
15 inches
Step-by-step explanation:
The shortcut for finding the side lengths on a 30°-60°-90° triangle is that the long leg is
the short leg × √3.
So for your question:
5√3 × √3
= 5 × √3 × √3
= 5 × 3
= 15
Just in case it comes up next, the other shortcut is that the hypotenuse is double the short leg. Hypotenuse =
2 × 5√3 = 10√3
Please help me I’m so sad
Answers
Answer:
Sym
Step-by-step explanation:
Select ALL equations that have no solution.
A 6x – 2 – 3x = 3x – 2
B 6x – (3x + 8) = 16x
C 10 + 6x = 15 + 9x – 3x
D 11 + 3x – 7 = 6x + 5 – 3x
E 12x + 2 = 2 + 12x
Answers
The equations have no solution.
6x – 2 – 3x = 3x – 2
10 + 6x = 15 + 9x – 3x
11 + 3x – 7 = 6x + 5 – 3x.
We have determine from the given option which option has no solution.
When an equation has a solution?
An equation with no solution will be an equation when simplified, which will be a false statement.
The equation, 6x – 2 – 3x = 3x – 2
add like terms,
3x-2=3x-2
So we get,This equation has no solution
10 + 6x = 15 + 9x – 3x
10+6x=15+6x
add like terms we cannot find the value of x.
Therefore the given equation has no solution.
11 + 3x – 7 = 6x + 5 – 3x.
add like terms,
4+3x=3x-5
we cannot find the value of x.
So this equation has no solution.
Therefore, The equations 6x – 2 – 3x = 3x – 2,10 + 6x = 15 + 9x – 3x and 11 + 3x – 7 = 6x + 5 – 3x have no solution.
To learn more about the no solution visit:
brainly.com/question/1792644
#SPJ1
Consider the relation below
Is it a function?
Is the relation a one to one function?
Is the inverse of the relation below itself of function ?
Answers
Answer:
it may be not
take an example x=(1) y={123) and define a relation of R as the set of pairs (1,1) (1,2)(1,3) so this not a function
what is the slope of a line that is perpendicular to y = 2x + 3
a. 2
b. -2
c. 1/2
d. -1/2
Answers
Answer: The answer is: a
If it takes 5 hours to drive 62 miles how fast are you going
Answers
Answer:
12.40mph
Step-by-step explanation:
The equation, 687.5 = 550(1 + 0.05t), represents the amount of money earned on a simple interest savings account. What does the value 550 represent?
The value 550 represents the initial balance in the account, which means the account started with $550.
The value 550 represents the final balance in the account, which means the account balance ended with $550.
The value 550 represents the final balance in the account, which means the account balance started with $550.
The value 550 represents the amount of interest earned, which means $550 was added to the initial balance.
Answers
Answer: The value 550 represents the initial balance in the account, which means the account started with $550.
Step-by-step explanation:
The 550 represents the start balance that was put into the account. The (1+0.05t0 is the interest being added every t years/months.
4.) Describe a series of transformations
(translate, rotate, reflect and dilate) that
takes triangle ABC to triangle CEF. Give all specific details.
Answers
The series of transformations of triangle ABC to triangle CEF is shown.
Explain the term transformation?A point, line, or geometry figure can be transformed in one of four ways, each of which affects the shape and/or location of the object. Pre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's ultimate shape and location.For the given transformations from triangle ABC to triangle CEF are-
Translation:
1 unit to the right2 units upward.Rotation: There is no rotation taken place.
Reflection: There is no reflection of the given triangle ABC.
Dilation: The dilation of the 2 times the original coordinates is taken place.
Thus, the series of transformations of triangle ABC to triangle CEF is shown.
To know more about the transformation, here
https://brainly.com/question/28025572
#SPJ1
Identify a value of k that transforms finto g, where g(x) = f(x) + k.
Answers
7 is a value of k that transforms f into g, where g(x) = f(x) + k. Using the concept of x and y-axis:
What is x-axis and y-axis?A two-dimensional number line, like two perpendicular axes, can be used as a coordinate system. This coordinate system is typical: The x-axis and y-axis are the names of the horizontal and vertical axes, respectively. The origin is the point at which all lines in a coordinate system intersect.
The coordinates that are shown on the x and y axes give rise to their respective names. The vertical y-axis is aligned with the horizontal x-axis. They are referred to as axes because they are perpendicular to one another.
From the graph it is observe that,
Graph of Function f(x) cut at y axis in the point 3
graph of function g(x) cut y axis in the point 4
So, the difference between the cut of y axis is k
Thus, {g(x)-f(x)=k}
Hence, k = [4 - (-3)] = 7
To know more about x and y-axis refer to:
https://brainly.com/question/24873877
#SPJ1
On Monday you run on treadmill for one half an hour at X mph on Tuesday you walk the same distance on the treadmill at 2 mph slower and it takes you three fourths an hour how many miles did you run on the treadmill on Monday
Answers
The number of miles that you ran on the treadmill on Monday will be 3 miles.
What is speed?Speed is defined as the length traveled by a particle or entity in an hour. It is a scale parameter. It is the ratio of length to duration.
We know that the speed formula
Speed = Distance/Time
On Monday you run on the treadmill for thirty minutes at x mph and on Tuesday you walk a similar distance on the treadmill at 2 mph increasingly slow takes you three-fourths 60 minutes.
Then the distance is the same in both cases. Then we have
x × (1/2) = (x - 2) × (3/4)
Simplify the equation, then we have
x × (1/2) = (x - 2) × (3/4)
4x = 6(x - 2)
4x = 6x - 12
2x = 12
x = 6 miles per hour
The number of miles is given as,
D = 6 × 1/2
D = 3 miles
The number of miles that you ran on the treadmill on Monday will be 3 miles.
More about the speed link is given below.
https://brainly.com/question/7359669
#SPJ1
a probability experiment consists of rolling a fair 10-sided die. Find the probability of the event below.
rolling a number greater than 3
Answers
The probability of getting a number larger than 3 is P = 0.7
How to find the probability?The probability is equal to the quotient between the number of outcomes that meet the condition, and the total number of outcomes.
The 10-sided die has the outcomes {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} so 10 outcomes.
The outcomes that are greater than 3 are {4, 5, 6, 7, 8, 9, 10} so there are 7 outcomes, then the probability is:
P = 7/10 = 0.7
Learn more about probability by reading:
https://brainly.com/question/25870256
#SPJ1
The last time Barry checked, his dog weighed 30 kilograms. Barry just measured his dog again and found out that it weighs 10% less now. How much does the dog weigh now?
Answers
27kg is the weight of Barrys dog now,
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
Given,
The weight of dog last time when Barry checked is 30kilograms.
Barry just measured his dog again and found out that it weighs 10% less now.
We need to find the weight of Barrys dog.
Convert 10% to decimal value
10/100=0.1
0.1×30=3
Now subtract 3 from 30
30-3
27
Hence, currently Barrys dog weight is 27kg.
To learn more on Percentage click:
https://brainly.com/question/28269290
#SPJ1
Under a translation 2 units to the right on the coordinate plane, point A maps to A’ and point B maps to B’
Answers
The correct statement as regards the transformation involving translation is
AB = A'B'What is transformation?Transformation is a term used in mathematics to refer to the movements made by objects.
Transformation is basically of two major divisions
Rigid transformationnon rigid transformationNon rigid transformation are the transformation where the dimension or size of the object will be different from the image, example is dilation
In rigid transformation, the dimensions of the object is maintained through out the transformation examples of rigid transformation are
rotationreflectiontranslationSince the transformation point A and point B made are all translation which is a type of rigid transformation, the dimension of the length will remain same
Learn more on transformation here:
https://brainly.com/question/4289712
#SPJ1
5. Two burgers and one hotdog cost $4.82. At the
same price, one
burger and two hotdogs cost $3.70.
How much does a hotdog cost?
Answers
Hello!
Let's use 'x' to represent the cost of the burger, and 'y' to represent the cost of the hotdog.
2x + y = 482
× + 2y = 370
2x + 47 = 740
-3y = -258
y = 86 cents
2x + 86 = 482
2x = 396
x = 198
A burger costs $1.98 and a hot dog costs $.86
I hope this didn't confuse you, I'm not very good at explaining!
someone help me with this equation please
4m^2=45+11m
solve with quadratic formula
Answers
m = 5 and m = -9/5 are the roots of the equation.
Factoring 4m²-11m-45
The first term is, 4m² its coefficient is 4 .
The middle term is, -11m its coefficient is -11 .
The last term, "the constant", is -45
Step-1 : Multiply the coefficient of the first term by the constant 4 • -45 = -180
Step-2 : Find two factors of -180 whose sum equals the coefficient of the middle term, which is -11 .
-180 + 1 = -179
-90 + 2 = -88
-60 + 3 = -57
-45 + 4 = -41
-36 + 5 = -31
-30 + 6 = -24
-20 + 9 = -11 That's it
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -20 and 9
4m² - 20m + 9m - 45
Step-4 : Add up the first 2 terms, pulling out like factors :
4m • (m-5)
Add up the last 2 terms, pulling out common factors :
9 • (m-5)
Step-5 : Add up the four terms of step 4 :
(4m+9) • (m-5)
Which is the desired factorization
Theory - Roots of a product
A product of several terms equals zero. When a product of two or more terms equals zero, then at least one of the terms must be zero. We shall now solve each term = 0 separately In other words, we are going to solve as many equations as there are terms in the product Any solution of term = 0 solves product = 0 as well.Now ,
1. Solve : m-5 = 0
Add 5 to both sides of the equation :
m = 5
2. Solve : 4m+9 = 0
Subtract 9 from both sides of the equation :
4m = -9
Divide both sides of the equation by 4:
m = -9/4
Learn more about Quadratic Formula at:
https://brainly.com/question/1214333
#SPJ1
what is the answer i need answers now I'm am going to fail
Answers
Answer:
D
Step-by-step explanation:
2 times 5x is 10x, and 2 x 1 is 2
Answer:
655
Step-by-step explanation:
Which expression is equivalent to (m^−2 n^−3)−3?
m6n9
m−6n−9
m−5n−6
1 over the quantity m raised to the fifth power times n raised to the sixth power end quantity
Answers
Answer:
(a) m^6·n^9
Step-by-step explanation:
You want to know an expression equivalent to (m^-2·n^-3)^-3.
Rules of exponents(ab)^c = (a^c)(b^c)
(a^b)^c = a^(bc)
Application[tex](m^{-2}n^{-3})^{-3}=m^{(-2)(-3)}n^{(-3)(-3)}=\boxed{m^6n^9}[/tex]
Pls Help ASAP) Willing to give 25 points) Pls show your work) If you don't know pls don't answer.
Answers
From the given statements about the linear graph, the correct ones are statements 1, 2 and 3 while the incorrect one is statement 4
How to interpret Linear Graphs?The slope of a linear graph is simply the change in the y-values divided change in the corresponding x-values.
Now, from the graph, if we take two coordinates, we can easily say that;
Slope = (18 - 16)/(0 - 100)
Slope = -2/10 = -1/5
Statement 1; From the graph, the y-intercept is $18. This means that this is the cost of the book as that is where the cost starts decreasing for each weed she pulls. Thus, it is true.
Statement 2; The slope as we saw earlier was -1/5. Thus, it means that her grandma pays $1 for every 5 weed she pulls.
Statement 3; The x-intercept is 90 and it means after 90 weeds pulled, she no longer has to use her own money at all for the book. This is correct.
Statement 4; This is wrong because she needs to pull at least 90 weeds for her not to use her money.
Read more about Linear Graphs at; https://brainly.com/question/4025726
#SPJ1
What’s true mean if mid value are 37.5 42.5 47.5 52.5 57.5 and number of students are 30,20,15,13,22 respectively
Answers
The true mean of the data-set is given as follows:
46.35.
How to obtain the mean of a data-set?
The mean of a data-set is calculated as the sum of all observations divided by the number of observations.
In this problem, the sum is given by the multiplication of the mid-values by the number of students with each value, as follows:
S = 37.5 x 30 + 42.5 x 20 + 47.5 x 15 + 52.5 x 13 + 57.5 x 22 = 4635.
The total number of students is given as follows:
30 + 20 + 15 + 13 + 22 = 100.
Hence the mean is calculated as follows:
Mean = 4635/100 = 46.35.
More can be learned about the mean of a data-set at https://brainly.com/question/1136789
#SPJ1