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September 21, 2014

September 21, 2014

Posted by **Matt** on Saturday, July 13, 2013 at 12:20pm.

- College Algebra -
**Steve**, Saturday, July 13, 2013 at 7:14pmsince time = distance/speed,

1080/s + 5/2 = 1080/(s-6)

s = 54

So, speed out = 54, sped back = 48

2160/(1080/54 + 1080/48) = 50.8 mph avg speed

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