Homework Help: math, algebra

Posted by jasmine20 on Sunday, December 17, 2006 at 7:55pm.

this next one i want to make sure that what i'm answering is correct.

(1) A rectangle has sides of 3x-4 and 7x+10. Find the expression that represents its perimeter.

My answer for solving:

P=2L+2W
P=2(3w-4)+ 2(7x +10)
p=6w-6+14x+10

My final answer:
P=20x+12

P=2L+2W
P=2(3w-4)+ 2(7x +10)
the w should be x

p=6w-6+14x+10
2*3x= 6x (you have 6w)
2*-4 = -8 and not -6.

On the next term:

2*7x=14x as you have it BUT
2*10=20 and not 10

These may just be typos because the final equation you have is correct.

sorry they were typos. thank you.

word problems assigment 9 - Anonymous, Tuesday, September 18, 2007 at 6:28pm
5x=11

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