Answer to Question #131729 in Algebra for Kiara

Question

A mail carrier can deliver mail to 36 houses in 30 minutes. Mark wants to determine how many houses the carrier can deliver mail to in 7.5 minutes at this rate. He thinks that to find the answer, he should do the following.

1. First divide 36 houses by 30 minutes to find a unit rate of 1.2 houses per minute.
2. Then multiply 1.2 houses per minute by 7.5 minutes to get 9 houses.

Answer 1

Mark's algorithm is correct, so the number of the houses the carrier can deliver mail to in 7.5 minutes at this rate is: $36/30×7.5 = 9.$