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Simple Perimeter

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Simple Perimeter

by zagcollins » Mon Jul 28, 2008 9:03 am
The area of square garden is A sq.feet and the perimeter is P feet. If A=2P+9, what is the perimeter of the garden, in feet?

A.28
B.36
C.40
D.56
E.64
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by sudhir3127 » Mon Jul 28, 2008 9:27 am
please search beofre u start a new thread.. answer is 36.
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by ricky » Mon Jul 28, 2008 9:36 am
Let x be side of the square.

A= x^2
P= 4x

Its given A= 2P+9

Substitute values of A and P solve the quadratic equation and solve for x.
U'll get two values of x.Take the Positive Value, which should be 9.
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