Question 347872
the length of a rectangle is 4 more than seven times the width. write an expression for the area a of the rectangle.
.
Let w = width
then from "length of a rectangle is 4 more than seven times the width" we have
7w+4 = length
.
since area=width*length:
{{{w(7w+4)}}}
{{{7w^2+4w}}}