The length of a rectangle is 5 in. more than its width. The perimeter of the rectangle is 42 in.

A. Define a variable for the width. Write an expression for the length in terms of the width.

B. Use the formula for the perimeter of a rectangle to write an equation to find the width of the rectangle. Solve your equation for the width.

C. What is the length of the rectangle?

Question

The length of a rectangle is 5 in. more than its width.  The perimeter of the rectangle is 42 in.
 
A.  Define a variable for the width.  Write an expression for the length in terms of the width.
 
B.  Use the formula for the perimeter of a rectangle to write an equation to find the width of the rectangle.  Solve your equation for the width.
 
C.  What is the length of the rectangle?

anonymous · Answer

A.) Let width = w and length = l.  w + 5 = l

anonymous · Answer

B.) P = 2l + 2w.  42 = 2(w + 5) + 2w

anonymous · Answer

Are you able to solve from there?