cheri finished the first 15 problems of the final exam in 20 minutes. at that rate how long will it take her to complete the 75 question final exam

Question

Im not sure on how to set up the equation for this pls help

Answer 1

I am sorry, I know it is too late to answer this but I just saw it!!!

 

15 problems take 20 minutes.

75 is 15*5 so it takes 20*5= 100 minutes to complete the final exam.