Question

Mrs. Avery’s test for her 1st period lasted 9 minutes longer than it was supposed to. Write an expression for the total amount of time her 1st period took their test if she was supposed to give it for m minutes long
m - 9
9m
m + 9
9 - m

Answer 1

It is m + 9 because if we let m = 60 and the lest was 9 minutes longer than m, the test would be 69 minutes long. Therefore the answer is m + 9