I keep getting this wrong. Can I get some help please. The length of a banner is 5ft longer than its width. If the area is 84sq ft, find the dimensions. The width of the banner is____ ft and the lenth is____ft.

Question

I keep getting this wrong.  Can I get some help please.  The length of a banner is 5ft longer than its width.  If the area is 84sq ft, find the dimensions.  The width of the banner is____ ft and the lenth is____ft.

anonymous · Answer

well lets call the width x since it is unknown and since length is 5 times this length is 5x and are is length*width therefore it is 5x^2=84

anonymous · Answer

so x = sqrt(84/5) and then just do width equals x and length is 5x after solving for x

anonymous · Answer

|dw:1354816847669:dw|Well the answer I was getting was 21 and 26