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Which value could replace x in the table?

7 – m

23 – m

8(15 – m)

8(15) – m

 Jan 4, 2021
 #1
avatar+41 
0

The question sort-of gets cut off at "There are 15"

 Jan 4, 2021
 #2
avatar+57 
0

is it this question?

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-response question. There are 15 questions on the test and the students have been given 55 minutes to complete it.

 

Because i've heard of this before.

 Jan 4, 2021
edited by JoLink  Jan 4, 2021
 #3
avatar+57 
+1

[I Tried to be as neat as I could]

 

Let

x = the number of multiple choice question

y = the number of free response question

 

we know that

 3x + 8y = 55 = Equation A

x+y=15

x = 15 - y = Equation B

 

Substitute equation B in equation A

3[15-y] + 8y = 55

45 - 3y+ 8y = 55

5y = 55 - 45

5y = 10

y = 2

 

Find the value of x

x = 15 -  y

x = 15-2= 13

therefore

the answer is

the number of multiple choice question are 13

the number of free response question are 2

 Jan 4, 2021
 #4
avatar+78 
+1

The process is really tedious but here is my answer(it might not be right)

 8(15 - m)

 

cheekycheekycheeky

 Jan 4, 2021

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