DDavid competed in a 65-km dirt bike race. For the second average speed 16 km/h slower than in the first half. Let x represent David's speed in the first half. Determine a simplified expression in terms of x for the total time he took to complete the race. a) If David rode his bike at an average speed of 35 km/h in the second half, how long did it take him to finish the race? b)

Inquiry into Physics
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ISBN:9781337515863
Author:Ostdiek
Publisher:Ostdiek
Chapter1: The Study Of Motion
Section: Chapter Questions
Problem 25P: . (a) Draw an accurate graph of the speed versus time for the train Problem 24. (b) Draw an accurate...
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1IDavid competed in a 65-km dirt bike race. For the second half of the race he rode his bIke
average speed 16 km/h slower than in the first half.
Let x represent David's speed in the first half. Determine a simplified expression in terms
of x for the total time he took to complete the race.
a)
If David rode his bike at an average speed of 35 km/h in the second half, how long did it
take him to finish the race?
b)
Transcribed Image Text:1IDavid competed in a 65-km dirt bike race. For the second half of the race he rode his bIke average speed 16 km/h slower than in the first half. Let x represent David's speed in the first half. Determine a simplified expression in terms of x for the total time he took to complete the race. a) If David rode his bike at an average speed of 35 km/h in the second half, how long did it take him to finish the race? b)
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