SOLUTION: Hello Tutors, Here is a question that is making me bang my head as the answr choices don't match my answer. Please explain to me. Thanks The area of a square region garden

Algebra ->  Points-lines-and-rays -> SOLUTION: Hello Tutors, Here is a question that is making me bang my head as the answr choices don't match my answer. Please explain to me. Thanks The area of a square region garden      Log On


   

Question 32573: Hello Tutors,
Here is a question that is making me bang my head as the answr choices don't match my answer. Please explain to me. Thanks
The area of a square region garden is A square feet and the perimeter is P feet. If A = 2P + 9, what is the perimeter of the garden, in feet?


Thanks
Tolly
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
Let the side of the square region garden is x ft
Area = x^2
Perimeter = 4x feet
Per question, x^2 = 2(4x) + 9
=> x^2-8x-9 = 0
=> (x-9)(x+1) = 0
=> x=9 (because x cannot be -ve)
The perimeter os the garden is 36 feet.