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December 19, 2014

December 19, 2014

Posted by **maggie** on Thursday, August 9, 2012 at 3:56pm.

- algebra -
**bobpursley**, Thursday, August 9, 2012 at 4:36pmdistance=(velocityboat+vstream)time

180=(vb+Vs)*10

180=(Vb-Vs)*15

divide both sides of a) by 10, and b) by 15

18=vb+vs

12=Vb-Vs

add the equations

30=2vb solve for vboat

then put that into either equation and solve for vstream

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