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The area of a square garden is A square feet and the

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The area of a square garden is A square feet and the [#permalink] New post 19 Apr 2006, 21:50
The area of a square garden is A square 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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 [#permalink] New post 19 Apr 2006, 21:53
B...

A = P^2/4
A = 2P+9
2 equations...
solve for P...
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Re: Square Garden [#permalink] New post 19 Apr 2006, 21:55
jlui4477 wrote:
The area of a square garden is A square 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


I think backsolving is the easiest for this one

as A must be a square
then 2P+9 must be a square
it happens to be 36
as 36*2 + 9 = 81

so I would go with B
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 [#permalink] New post 19 Apr 2006, 22:23
Got B, same approach as willget800.
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 [#permalink] New post 20 Apr 2006, 07:06
The Answer is B!!


p^2 - 36P + 4P - 144 =0
Solving we get the answer!
  [#permalink] 20 Apr 2006, 07:06
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