SOLUTION: During the first part of a​ trip, Adrian drove 44 miles at a certain speed. Adrian drives another 44 miles on the second part of the trip at a speed 5 mph faster.

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Question 1115735: During the first part of a​ trip, Adrian drove 44

miles at a certain speed. Adrian drives another 44

miles on the second part of the trip at a speed 5

mph faster. Driving time for the entire trip was 80

mins. Find the rate at which Adrian drove during the first part of the trip.
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
                 SPEED           TIME                   MILESDISTANCE

FirstPart          r             44%2Fr                    44

SecondPart        r+5            44%2F%28r%2B5%29                44

Total                           1%261%2F3


80 minutes is 1 hour 20 minutes or, 1 hour and 1/3 of an hour.

Use from the equation 44%2Fr%2B44%2F%28r%2B5%29=1%261%2F3.