
(a)
The distance at which the Team C’s runner passed Team B’s runner.
(a)

Answer to Problem 30E
It seems that distance at which Team C’s runner passed Team B‘s runner is 40 meters.
Explanation of Solution
Given information:
Formula used:
The x-axis represents the time in seconds and the y axis represents distance in meters.
Calculation:
From the graph, it seems that distance at which Team C’s runner passed Team B‘s runner is 40 meters.
Conclusion:
It seems that distance at which Team C’s runner passed Team B‘s runner is 40 meters.
(b)
The races are longer than Team C’s runner have passed Team A’s runner.
(b)

Answer to Problem 30E
For a longer race, Team C’s runner could have passed Team A’s runner.
Explanation of Solution
Given information:
Formula used:
The x-axis represents the time in seconds and the y axis represents distance in meters.
Calculation:
Since, the slopes of line corresponding to Team A and Team C are different, the two lines would intersect at some point and that happens for t > 0. At this point, Team C’s runner would have passed Team A’s runner.
In graph we can see that that it would happen for distance greater than 200 meters. Thus, for a longer race, Team C’s runner could have passed Team A’s runner.
Conclusion:
For a longer race, Team C’s runner could have passed Team A’s runner.
(c)
The race being longer Team B’s runner have passed Team A’s runner.
(c)

Answer to Problem 30E
Even in a longer race, Team B’s runner cannot pass Team A’s runner.
Explanation of Solution
Given information:
Formula used:
The x-axis represents the time in seconds and the y axis represents distance in meters.
Calculation:
Since, the slope of lines corresponding to Team A and Team are same but intercepts are different. The two lines never intersect. This means that Team A would always be ahead of Team B.
Thus, even in a longer race, Team B’s runner cannot pass Team A’s runner.
Conclusion:
Even in a longer race, Team B’s runner cannot pass Team A’s runner.
Chapter 5 Solutions
BIG IDEAS MATH Algebra 1: Common Core Student Edition 2015
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