Question

Describe a situation with an output of area in square feet that can be modeled using the function f(x) = (x)(2x + 5).

Answer 1

The area of a rectangular garden can be represented by the function
f(x) = x(2x + 5)
Find the area if the length, x, is 3 feet.

Answer 2

The area is length times width
width=x and length is z

if the length is 5 more than twice the width, express the area in terms of the width

so then
f(x)=xz
z=5+2x or 2x+5
f(x)=(x)(2x+5)