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Concept explainers
To calculate:The speed of Mark and Carole.
![Check Mark](/static/check-mark.png)
Answer to Problem 12MPS
Mark wasdriving with an average speed of 84 mph.
Carole was driving with an average speed of 82 mph.
Explanation of Solution
Given information:
At 3:00 p.m. Mark left Pittsburgh and drove 208km towards Cleveland.
At 3:30 p.m. Carole left Cleveland and headed towards Pittsburgh at a rate of 2km/h slower than Mark.
Their car passes each other at 4:30 p.m.
Formula used:
Calculation:
Let us assume,
Mark’s average rate =v
Carole’s average rate=
The sum of the distance that each of them drove=d=208km
From
Therefore,
Since,
So,Mark wasdriving with an average speed of 84 mph and,
Carole was driving with an average speed of 82 mph.
Chapter 5 Solutions
Algebra: Structure And Method, Book 1
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