SOLUTION: The top of Billie’s square-shaped table has side lengths of 2x – 9 inches and an area of 320 square inches. What is the value of x?

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Question 1034190: The top of Billie’s square-shaped table has side lengths of 2x – 9 inches and an area of 320 square inches. What is the value of x?
Answer by sachi(548) About Me  (Show Source):
You can put this solution on YOUR website!
clearly (2x-9)^2=320 sq inchs
so 2x-9=320^0.5=17.889
so x= (17.889+9)/2=13.44 sq inchs
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