A rectangle has 3 sides of 3x-4 and 7x+10. Find the expression that represents its perimeter.
2007-09-10 19:10:44 · 5 answers · asked by lele 2 in Science & Mathematics ➔ Mathematics
sorry, a rectangle has 4 sides
2007-09-10 19:43:23 · update #1
Actually........ A rectangle has 4 sides. In this case, 2 of them are
3x-4 units long and the other 2 are 7x+10, so the total perimeter is
2*(3x-4)+2*(7x+10) = 20x+12
HTH
Doug
2007-09-10 19:21:22 · answer #1 · answered by doug_donaghue 7 · 1⤊ 1⤋
Hey Kid,
Try this, just multiply each side of the rectangle by 2 and add them all to get the perimeter:
perimeter= 2(3X-4)+2(7X+10)
Simplify the equation and you got what you need
2007-09-11 04:14:07 · answer #2 · answered by Ray 1 · 1⤊ 1⤋
huh?
a rectangle should have 4 sides, and 2 of them should be equal...
2(3x-4) + 2(7x+10) = P
2007-09-11 02:15:52 · answer #3 · answered by J.W. 2 · 2⤊ 1⤋
3 sides? doesn't rectangle have 4 sides?
anyway; P=2w+2l
=2(3x-4)+2(7x+10)
=6x-8+14x+20
P=20x+12
2007-09-11 02:16:16 · answer #4 · answered by Anonymous · 1⤊ 1⤋
in this case i think it should be like this
(3x-4)*3 + 7x+10= 16x-2
because there are three sides that are 3x-4 so we need to times 3
hope this will help you solve your problem
2007-09-11 02:46:28 · answer #5 · answered by Fayth 3 · 0⤊ 1⤋