SOLUTION: A rectangle has a length that is 9inches less than twice it’s width. The area of the rectangle is 180 square inches A) Write an equation that represents the situation B)find

Algebra ->  Equations -> SOLUTION: A rectangle has a length that is 9inches less than twice it’s width. The area of the rectangle is 180 square inches A) Write an equation that represents the situation B)find       Log On


   

Question 1114658: A rectangle has a length that is 9inches less than twice it’s width. The area of the rectangle is 180 square inches
A) Write an equation that represents the situation
B)find the lenght and width of the rectangle
C)find the perimeter of the rectangle
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
2x-9 and x, the dimensions

x%282x-9%29=180
-
2x%5E2-9x-180=0
discriminant, 81%2B4%2A2%2A180=81%2B4%2A360=1521, which is 39%5E2.

highlight_green%28x=%289%2B39%29%2F4%29
You can finish the rest...