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August 21, 2014

August 21, 2014

Posted by **Taylor** on Monday, September 26, 2011 at 5:13pm.

- Math -
**Henry**, Tuesday, September 27, 2011 at 9:01pmVp- Vw = 900mi / 9h = 100mi/h.

Vp + Vw = 900mi / 5h = 180mi/h.

Eq1: Vp - Vw = 100.

Eq2: Yp + Vw = 180.

Multiply both sides of Eq1 by (-)1:

-Vp + Vw = -100

Vp + Vw = 180

Sum: 2Vw = 80,

Vw = 40mi/h.

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