The perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width.
2006-08-15 12:51:29 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Length is 7 inches.
Width is 4 inches
Twice the width is 8 inches
One inch less is 7 inches
7 * 4 = 28
2006-08-15 12:57:38 · answer #1 · answered by Cool-K 3 · 0⤊ 1⤋
The formula for perimeter is 2L+2w
For this particular case: 2L+2w=28
It is said that L = 2w-1
By substitution, 2(2w-1)+2w=28
4w-2+2w=28
6w-2=28
6w=30
w=5
L=2w-1
Substitution: L=2(5)-1
L=10-1
L=9
The rectangle has a length of 9 inches and a width of 5 inches.
2006-08-15 13:28:43 · answer #2 · answered by Linduh. 3 · 0⤊ 0⤋
Perimeter= 2l + 2w = 28
l=2*w-1
2(2*w-1)+2*w = 28
4*w -2 + 2*w = 28
6 * w -2 = 28
6 * w = 30
w = 5
width = 5 length = 9
2006-08-15 13:00:48 · answer #3 · answered by maegical 4 · 1⤊ 0⤋
w=10 and l=4
2006-08-15 12:57:57 · answer #4 · answered by John L 1 · 0⤊ 1⤋
P=28
L=2W-1
2L+2W=28 (P)
Use Substition Method:
2(2W-1)+2W=28
6W-2=28
6W=26
W=26/6=13/3
W=13/3
2006-08-15 12:59:51 · answer #5 · answered by Anonymous · 0⤊ 1⤋
P = 2(l + w)
l = 2w - 1
28 = 2((2w - 1) + w)
14 = 2w - 1 + w
14 = 3w - 1
3w = 15
w = 5
l = 2(5) - 1 = 10 - 1 = 9
ANS : 5 inches
2006-08-15 14:59:04 · answer #6 · answered by Sherman81 6 · 0⤊ 0⤋
2(w+2w-1)=28
w+2w-1=14
3w-1=14
3w=15
w (width)=5 inches
2006-08-15 12:57:57 · answer #7 · answered by shmux 6 · 1⤊ 0⤋
I have rated the correct ones if you look soon.
W=5
L=9
Either of the correct ones are well laid out.
In my view maegical for best answer as there are no unknown steps.
2006-08-15 13:19:04 · answer #8 · answered by slatibartfast 3 · 0⤊ 0⤋