SOLUTION: During the first part of a trip, a canoeist travels 90 miles at a certain speed. The canoeist travels 16 miles on the second part or the trip at a speed 5 mph slower. The total tim
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Question 169350: During the first part of a trip, a canoeist travels 90 miles at a certain speed. The canoeist travels 16 miles on the second part or the trip at a speed 5 mph slower. The total time for the trip is 5 hours. What is the speed on each part of the trip?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
let x="speed on 2nd part", so x+5="speed on 1st part" __ t=d/r
90/(x+5) + 16/x = 5 __ multiplying by x(x+5) __ 90x+16x+80=5x^2+25x
5x^2-81x-80=0 __ use quadratic formula to find x
ANSWER BELOW
x=17.13 (approx)
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