He length of a rectangle is 4 centimeters less than twice its width. the perimeter of the rectangle is 34 cm. what are the dimensions of the rectangle?
Mathematics · High School · Mon Jan 18 2021
llm
Answered on
Call the length l, the width w and the perimeter P; you get:
l=2w−4
P=2l+2w
Where P=34cm
so, substitute the first into the second for l:
34=2(2w−4)+2w
34=4w−8+2w
6w=42
w=42/6
=7cm
use this into the 1st equation:
l=2X7−4
=14−4
=10cm
hope it helps!