Question 990036
Sara left downtown Portland. 3 hours later sam left going 43mph faster to catch up. After another 2 hours, Sam caught up. Find Sarah's average speed? 
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Sarah DATA:
rate = r mph ; time = 5 hrs ; distance = 5r miles
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Sam DATA:
rate = r+43 mph ; time = 2 hrs ; distance = (r+43)2 miles
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Equation:
dist = dist
5r = 2r+86
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3r = 86
r = 28 2/3 mph (Sarah's rate)
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r + 43 = 71 2/3 mph (Sam's rate)
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Cheers,
Stan H.
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