Question

a rectangle has a lenght of 2x and a with of x+3 the perimeter is 78 find the dimensions

Answer 1

First, do you know how to find the perimeter of a rectangle?

Answer 2

that just hurt my brain its too late for math lol

Answer 3

they give you L = 2x and W =x+3.
With that and the understanding of perimeter...set it up

Answer 4

ok

Answer 5

perimeter P=2(l+w)
2(l+w) = 78
2(2x+x+3) 78
3x+3=39
3x=36
x=12
l =x = 12
w = x+3 =15
source: http://www.mathskey.com/question2answer/