Question

Justin ran 15 miles at a constant rate in 2.5 hours. The next day, he ran at a rate that was 1 mph slower. What was Justin’s rate the second day?

Answer 1

We can use the factor label method for this problem. The real hint to these types of equations are the units. In this case the units are in miles per hour for the rate.
15 miles/ 2.5 hours = 6mph or 6 miles/hours
If his rate was 1 mph slower we just subtract 1 from 6 mph
6mph - 1mph= 5 mph.

Hope this helps, good luck.

Answer 2

5 miles per hour.

Explanation:

To solve this problem we first have to calulate the rate at which Justin ran the first day, that is done by dividing the distance by the time:

Rate=distance/time

Rate= 15/2.5

Rate= 6 miles per hour

Since he ran at 6 miles per hour and the next day he ran 1 mile per hour slower he would have run at a 5 mph rate the next day.