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Allis drives 15 miles faster than diana. In the same time Diana travels 440 miles, Allie goes 560 miles. Find their speeds
8 years ago

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Steve
a = d+15

time = distance/speed, so

440/d = 560/a

Now substitute for a, and you get

440/d = 560/(d+15)

Now you can solve for d, and then get a.
8 years ago

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