SOLUTION: During the first part of a trip, Adrian drove 50 miles at a certain speed. Adrian drives another 50 miles on the second part of the trip at a speed 5 mph faster. Driving time for t
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Question 1128345: During the first part of a trip, Adrian drove 50 miles at a certain speed. Adrian drives another 50 miles on the second part of the trip at a speed 5 mph faster. Driving time for the entire trip was 88 mins. Find the rate at which Adrian drove during the first part of the trip.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = speed for 1st part of trip
= speed for 2nd part of trip
Let = time in hrs for 1st part of trip
= time in hrs for 2nd part
------------------------------------------
1st part:
(1)
2nd part:
(2)
----------------------------------------
(2)
(2)
(2)
(2)
(2)
------------------------------------------
(1)
(1)
(1)
(1)
(1)
(1)
---------------------------------------
Solve using quadratic formula.
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