The difference between the length and width of a rectangle is 7 cm. The perimeter of the rectangle is 22 cm. Find the length and width.
For graph...just use coordinates.
2006-06-10 11:37:28 · 3 answers · asked by jrrkidd 1 in Education & Reference ➔ Homework Help
Let width = W and length = L
L = 7 + W
Perimeter is two widths plus two lengths, so
2W + 2(7 + W) = 22
2W + 14 + 2W = 22
(subtract 14 from both sides)
4W = 8
(divide both sides by 4)
W = 2
Since L = 7 + W, then
L = 7 + 2
L = 9
I can't help with the graphing, as that doesn't make sense to me in this problem.
2006-06-10 12:01:54 · answer #1 · answered by Kelly F 2 · 0⤊ 0⤋
No graph is necessary, is it? Let the length be greater than the width; then if the length is x, then the width is x - 7.
The perimeter is 2 * x + 2 * (x - 7) = 4 * x - 14
Therefore 4 * x - 14 = 22
x = 9
The rectangle is 9 cm by 2 cm
2006-06-10 18:43:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
wide is4 , length is 11.
2006-06-10 18:41:19 · answer #3 · answered by Anonymous · 0⤊ 0⤋