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Alina [70]
3 years ago
9

Evelyn answered 42 questions correctly on her multiple choice history final and earned a grade of 21%. How many total questions

were on the final exam?
Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
4 0

Answer:

200 questions

Step-by-step explanation:

Given data

Let the total questions be x

so that

21% of x= 42 questions

let us solve for x

21/100*x= 42

0.21*x= 42

0.21x= 42

Divide both sides by 0.21

x= 42/0.21

x= 200 questions

Hence the questions are 200 questions

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*<br> 30 35 40<br> 45 50 55 60<br> 65 70 75<br> 80<br><br><br> c. Determine the median
tester [92]

Answer:

median is 55

Step-by-step explanation:

6 0
3 years ago
The graph of the function f(x) = (x − 3)(x + 1) is shown.
Nutka1998 [239]
Option A. All the real values of x where x < -1

Procedure
Solve the inequality:
(x -3)(x+1)>0
That happens in two cases.

1) When both factors >0
x-3>0 and x+1>0
x>3 and x >-1

The intersection is x >3

2) When both factors <0
x-3<0 and x+1<0
x<3 and x<-1

the intersection is x<-1.

We have obtained that the function is positive for the intervals  x < -1 and x > 3. But in one of those intervals the function is decresing and in the other is increasing.

You can recognize that the function given is a parabola and, because the coefficient of the quadratic term is positive, the parabola opens upward. Then the function is decreasing in the  first interval and increasing in the second interval.
6 0
3 years ago
Read 2 more answers
The output is eleven more then the input
enot [183]
The input is known as x and the output is known as y in math.
So you’re stating that we’re making the equation equal the output, y, and we’re adding based off of the word “more”. Now that we know we’re adding, we have to find what we are adding together. We are adding x and 11 is that it equals y. Note that x and y could be many different variables and values.
Y= x+11
5 0
3 years ago
25 Points!!! This should be quick and easy for anyone who knows math well!
Ede4ka [16]

Answer:

Output = 8- input

Step-by-step explanation:

The first point is  (1,7)

The input is 1 and the output is 7

The lines goes down, so we know that this is subtraction

Output = 8- input

7 = 8-1

Lets check another point

(5,3)

3 = 8-5

This checks

4 0
3 years ago
the number of hours h that it takes for ice to malt varies inversely with the temperature t it takes 3hours for a piece of ice t
Reptile [31]

Answer:

Step-by-step explanation:

Formula

h = k/temp

Givens

h = 4 hours

t = 45 degrees

Solution

3 = k / 45                  Multiply both sides by 45

3*45 = k

k = 135

Problem

what happens when h = 4 hours?

h = 4

k = 135

temp = ?

4 = 135 / temp       Multiply both sides by temp

4temp = 135          Divide by 4

temp = 135 / 4

temp = 33.75

Note that as the time went up, the temperature came down

6 0
2 years ago
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