b) The formula for perimeter of a rectangle is 2W + 2L = P
W is the width, L is the length, and P is the perimeter. Rewrite the formula (plug in the value of L found in part a and the value of P).

@nikato

Question

b) The formula for perimeter of a rectangle is 2W + 2L = P
W is the width, L is the length, and P is the perimeter. Rewrite the formula (plug in the value of L found in part a and the value of P).  

@nikato

nikato · Answer

so from the previous problem, we said
L=4w and that P=80
so plug it into the equation where you see L and P
so

2W + 2(4w) = 80

bossimbacon · Answer

so do i multiply 2 ( 4w) ? @nikato

nikato · Answer

yea. and you can simplify it more by combining the two terms on the left

bossimbacon · Answer

so it would equal 10w = 80?

nikato · Answer

yes

bossimbacon · Answer

then i divide 10 by both sides which would equal w = 8

nikato · Answer

correct. which means the width is 8