Question

The width of a rectangle is 6 in. less than its length. The perimeter is 68 in.

What is the width of the rectangle?


in.

Answer 1

I think its 14

Answer 2

nope, let's start from the beginning

Answer 3

let L = length
let W = width

W = L - 6, with me so far?

Answer 4

yes

Answer 5

ok, now we use the formula for perimeter

perimeter = 68 = 2(L+W), with me so far?

Answer 6

yup:)

Answer 7

good, now we can rewrite our formula

we know that W = L - 6, so we can replace "W" with "L-6" whenever we see it

perimeter = 2(L+W) = 2(L+L-6), understand so far?

Answer 8

Lol Ya

Answer 9

good, now let's put L + L together to get 2L

perimeter = 2(2L-6) = 68

know how to solve for L now?

Answer 10

actually, you were right, W = 14, my bad ;_:

Answer 11

Lol I thought so... I'll still give you a medal:) @Vocaloid