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January 29, 2015

January 29, 2015

Posted by **Gloria** on Sunday, April 24, 2011 at 7:30pm.

- Algebra -
**bobpursley**, Sunday, April 24, 2011 at 7:34pmif the 12 hours is total, then

30/hr*timeA+ 40/hr*TimeB=400

and timeA+TimeB=12

30*(12-timeB)+40*TimeB=400

10timeB=400-360

timeB=4hrs

TimeA=8hrs

check: 8*30+4*40=240+160=400

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