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August 30, 2014

August 30, 2014

Posted by **karon** on Tuesday, December 13, 2011 at 9:05pm.

- algebra -
**bobpursley**, Tuesday, December 13, 2011 at 9:07pmIn 28 hours, Jack can do 7 lawns, and mariltn can do 4, so combined, in 28 hrs, they can do 11 lawns.

rate combined: 11/28 lawns per hour

time= 1lawn/rate= 28/11 hours.

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