math
posted by susie .
A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
3x4+7x+10=
3x+7x=10x
−4+10= 14
10x+14
that is my answer please help
You just added two sides, a rectangle has four sides. So the perimeter should be twice what you calculated. However, you have several errors.
4+10=6
So you should have gotten 10x6, however, that needs to be doubled (you only added two sides).
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