Question

Can someone pls help me!

Ms. Failla decides that she wants to give a test on ratios and rates. The test consists of 18 questions. How much time must Mrs. Storz give to her students if she plans that the students can answer the questions at a rate of 3 questions in 7.5 minutes?

Answer 1

Mrs. Storz must give 45 minutes

Explanation:

Create a proportion:

t = total time given for all questions

`(3)/(7.5) = (18)/(t)`

Cross multiply:

3t = 135

Divide both sides:

3t/3 = 135/3

t = 45