Can someone help me out with this Math problem?

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A rectangle has sides of 3x – 4 and 7x.
What is the expression that represents its perimeter?

2007-10-04 13:26:37 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

perimeter = 2 x width + 2 x length

2(3x-4) + 2(7x)

6x -8 +14x

20x - 8

2007-10-04 13:31:19 · answer #1 · answered by mathmos_man 1 · 0⤊ 0⤋

perimeter = 2(l + w)

P = 2( 3x-4+7x) = 2(10x - 4) = 20x - 8

2007-10-04 20:31:33 · answer #2 · answered by norman 7 · 0⤊ 0⤋

P=2l+2w where p=perimeter; l=length; w=-width
P=2(3x-4)+2(7x)
P=6x-8+14x
P=20x-8

2007-10-04 20:35:16 · answer #3 · answered by Ross 1 · 0⤊ 0⤋

2(3x+4) + 2(7x)

6x+8+14x

20x+8

2007-10-04 20:32:48 · answer #4 · answered by Hayden M 2 · 0⤊ 0⤋

2(3x-4)+2(7x)

2007-10-04 20:32:31 · answer #5 · answered by Sanchez_150 2 · 0⤊ 0⤋