Question 584498
"the building is ten feet longer than wide" ___ so the perimeter of the sidewalk will be also


2x + 2(x + 10) = 192 ___ 4x + 20 = 192 ___ x = 43, x + 10 = 53


area of building plus sidewalk ___ 43 * 53


area of sidewalk ___ 704


area of building ___ (43 - 2w)(53 - 2w) where w is the width of the sidewalk


(43 * 53) - 704 = (43 - 2w)(53 - 2w) ___ 4w^2 - 192w - (43 * 53) + 704 = 0