SOLUTION: To travel 60 miles, it takes Sue, riding a moped, 2 hours less time than it takes Doreen to travel 45 miles riding a bicycle. Sue travels 11 miles per hour faster than Doreen. Find

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Question 918959: To travel 60 miles, it takes Sue, riding a moped, 2 hours less time than it takes Doreen to travel 45 miles riding a bicycle. Sue travels 11 miles per hour faster than Doreen. Find the times and rates of both girls.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
45%2Fr+-60%28r%2B11%29+=+2
2r^2 + 37r - 495 = 0 (Tossing out the negative solution for unit measure)
r = x+=+%28-37+%2B-+sqrt%28+5329%29%29%2F%284%29+
r = x+=+%28-37+%2B-+73%29%2F%284%29+
r = 9mph, Doreen'x speed. Her time 5hr
Sue 20mph. Her time 3hr