An inequality to show how the runner can achieve his goal of having average running time of less than
Explanation of Solution
Given information:
The runners time in the four races he has completed are
The runner plans to run one more race.
Calculations:
Total time taken by the runner in completing the race four times is
Let the time taken by the fifth race be
Therefore total time taken for the five race is =
Now average time for the five races is,
Now for average time less than
Now solving the inequality we can get the time taken for the fifth race,
Thus the time for the fifth race should be less than
Chapter 2 Solutions
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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