math polynomials word problems

Question

5) The length of a classroom is 4ft longer than its width.Write a polynomial to express the area of the classroom,Then calculate the area if the width is 22ft.

4) Bedroom has a length of (x+3) ft and a width of (x-1)ft.Write a polynomial to express the area of the bedroom,then calculate the area if x=10

Answer 1

A(w)= Lw= (4+w)w

= w^2+ 4w

A(22)= 22^2+4(22)=484+88= 572 ft^2

A(x) =(x+3)(x-1)= x^2 +2x -3

A(10)=117