SOLUTION: The area of a rectangle is 243m squared. The height is nine less than four times the base. What is the perimeter?

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Question 151036This question is from textbook
: The area of a rectangle is 243m squared. The height is nine less than four times the base. What is the perimeter? This question is from textbook

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
xy=243
x=243/y
x=4y-9
(4y-9)y=243
4y^2-9y=243
4y^2-9y-243=0
(4y+27)(y-9)=0
y-9=0
y=9 answer for the height.
x=4*9-9
x=36-9
x=27 answer for the base.
proof:
9*27=243
243=243