<PRE><B>Question 1056022</B>
Suppose that during a test drive of two cars, one car travels 328 miles in the same time that the second car travels 280 miles. If the speed of one car is 12
miles per hour faster than the speed of the second car, find the speed of both cars.
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d = r*t
t is the same
---
280 = r*t
328 = (r+12)*t
----
t = 280/r
t = 328/(r+12)
---
280/r = 328/(r+12)
280*(r+12) = 328r
280r + 3360 = 328r
48r = 3360
r = 70 mi/hr
r+12 = 82 mi/hr



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