Question 103615
The length of a rectangle is 3 inches more than the width.  The perimeter of the rectange is 24 inches.
a.) define variables
 L-length, W-width, P-perimeter
b.) write the expression for the length in terms of the width
 L=3+W
c.) substitute what you know into the equation. Be sure you only have one variable
The step you're missing is the equation of the perimeter of a rectangle
{{{P=2L+2W=24}}}
{{{2(3+W)+2W=24}}}
{{{2(3)+2(W)+2W=24}}}
{{{6+4W=24}}}
{{{6-6+4W=24-6}}}
{{{4W=18}}}
{{{W=18/4=9/2}}}
W=4.5 inches
d.) what is the length of the rectangle?
 {{{L=3+9/2=6/2+9/2=15/2}}}
L=7.5 inches



write the expression for the length in terms of the width
c.substitute what you know into the equation. Be sure you only have one variable
d.what is the length of the rectangle?