Solve the problem.On a 625 mile road trip, out to Yellowstone National Park Toby's average speed was x miles per hour. On his return trip, he averaged 15 miles per hour more than his trip to the park. The time that it took Toby to drive to the park can be represented by the rational expression 
, while the time it took Toby to return home can be represented by the rational expression 
. a. Write a simplified rational expression that describes the difference in the time it took Toby to drive to the park and the time it took him to return home. b. What was the difference in the
time it took Toby to drive to the park and the time it took him to return home if he averaged 63 miles per hour on his drive home? Round your answer to the nearest tenth .
A. a. 
;
b. 1.3 hour(s)
B. a. 
;
b. 3.1 hour(s)
C. a. 
;
b. 3895.1 hour(s)
D. a. 
;
b. 3.1 hour(s)
Answer: D
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k
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