SOLUTION: At the same time, two buses leave a depot and travel in opposite directions on a straight road. The first bus averages 8 mph more than the second. If they are 150 miles apart aft

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Question 787527: At the same time, two buses leave a depot and travel in opposite directions on a straight road. The first bus averages 8 mph more than the second. If they are 150 miles apart after an hour and a half, how fast is each bus going?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Sum of their distances is 150 miles, for how much time, h? Find rate of the busses.

Second bus speed, r
First bus speed r+8
GIVEN: 1.5 hours.

r%2A1.5%2B%28r%2B8%291.5=150
1.5%28r%2Br%2B8%29=150
2r%2B8=150%2F1.5
2r%2B8=100
r%2B4=50
highlight%28r=46%29 so r%2B8=highlight%2854%29