Tuesday

July 29, 2014

July 29, 2014

Posted by **lulu** on Wednesday, January 9, 2013 at 9:18pm.

- algebra/ word problem -
**HELP HELP HELP MNHS**, Wednesday, January 9, 2013 at 9:29pmlet x - rate in still water

y - rate of current

R * T = D

UPS x-y 1.5 6mi

DOWNS x+y 1 6mi

1.5(x-y)=6 ----- 1.5x-1.5y = 6

-1.5[(x+y)=6] -- -1.5x-1.5y = -9

________________

by elimination -3y = -3

method y = 1mph(current)

x+1=6

x=5mph (still water)

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