Question

Deandra is doing her math homework. Out of 24 problems total, she completed the first 12 problems in 1 hour and the last 12 problems in 3 hours. What is the unit rate for all 24 problems?

Answer 1

b

Step-by-step explanation: 6 problems per hour

Showing Work

This is a fraction equal to

24 problems ÷ 4 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 4

24 problems ÷ 4

4 hours ÷ 4

=

6 problems

1 hour

=

6 problems

hour

= 6 problems per hour

Answer 2

6 problems per hour

Explanation:

The first hour, she completed 12 problems, but for the last 12 it took her 3 hours.

Time Space 1: 1 hour for the first 12.

Time Space 2: 3 hours for the last 12.

Since we already know that there are 24 problems total, and 12 plus 12 equals 24; we can add the hours together ( 1 + 3 = 4 )

24 problems took 4 hours to complete.

Divide the 24 problems by the 4 hours to get the basic unit of

6 problems per hour which is the answer