How do I write a system of equations for this?
Kirma bought 12 feet of framing material to make a rectangular frame for her oil painting. She uses all the framing material and the length is twice the width.
Kirma bought 12 feet of framing material to make a rectangular frame for her oil painting. She uses all the framing material and the length is twice the width.
?
Perimeter of rectangle, P = 2L + 2W = 12'
We know that L = 2W, so
P = 2(2W) + 2W = 12' ...........ANS
6W = 12'
W = 2'
L = 2W = 2(2) = 4'
------------------
CHECK THE SOLUTION:
P = 2L + 2W = 2(4') + 2(2')
= 8' + 4'
= 12' .............CORRECT
fcas80
12 = 2L + 2W
L = 2W