Write an expression in simplest form that represents the area (in square feet) of the banner.

Question

The is a box and the length is (3+x) and the with is 3ft

Answer 1

Assuming you mean we have a rectangular banner with

length = 3 + x  and width = 3

(no box included)

 

Area = length*width

A = 3(3+x) = 3x + 9 ft²