Question

A rectangle's length is 4 feet more than its width. write a quadratic function that expresses the rectangle's area in terms of its width.

Answer 1

length=l
width=w

l=w+4

normally the Area of a triangle is height * Base *1/2

assuming length is height, and base is width

l*w *(1/2) substitute w+4 for l

(w+4)w(1/2)

Answer 2

Answer choices are:
A(w)=w+4
A(w)=w^2+4w
A(w)=lw
A(w)=w^2-4w

I'm guessing its the first.

Answer 3

but since it is are of a triangle it is 1/2 of that.
maybe you meant for area of rectangle, not triangle?