The area of a square garden is Q square feet and the perimeter is P feet. If Q=2P+20, what is the perimeter of the garden in feet?  Pick.
A) 32	B) 36	C) 40	D) 44	E) 48
Let x be the length of one side of the square garden.   x^2 = 8x + 20   x^2 - 8x - 20 = 0   (x-10)(x+2) = 0   x = 10, -2   P = 4(10) = 40   The answer is 40.
<result>C</result>
The area of a square garden is Q square feet and the perimeter is P feet. If Q=2P+20, what is the perimeter of the garden in feet?