Homework Help: algebra

Posted by Warren on Thursday, September 9, 2010 at 12:41am.

You are putting a stone borderof uniform width around a rectangular garden that measures 6 yards by 15 yards. You only have enough stone to cover 100 square yards. How wide should the border be? Solve using the 5 step process.

algebra - Reiny, Thursday, September 9, 2010 at 8:22am
Area of garden NOT covered with stone border
= (15-2x)(6-2x)

so
(15)(6) - (15-2x)(6-2x) = 100

solve this resulting equation for x

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