Question

mr. Perry grated 15 problems in 4 minutes if he has 90 problems to grade how many minutes will it take

Answer 1

Answer:

Below.

Step-by-step explanation:

She graded 15 problems in 4 minutes. So?

90 divided by 4=6. So?

4x6=24.

It will take her 24 minutes to grade 90 problems.