The following table shows the length and width of two rectangles:

Length Width
Rectangle A x + 8 x - 1
Rectangle B 4x + 5 3x - 2

Which expression is the result of the perimeter of rectangle B minus the perimeter of rectangle A?
10x - 12

18x + 32

10x - 8

18x + 6

Question

The following table shows the length and width of two rectangles:


 	              Length	Width
Rectangle A	x + 8	x - 1
Rectangle B	4x + 5	3x - 2


Which expression is the result of the perimeter of rectangle B minus the perimeter of rectangle A?
 10x - 12

 18x + 32

 10x - 8

 18x + 6

anonymous · Answer

@amistre64

anonymous · Answer

is it C

anonymous · Answer

@yamyam70

anonymous · Answer

@cwrw238

anonymous · Answer

@vzfreakz

anonymous · Answer

im thinking C because the equation for the perimeter is 2L+2w=P

amistre64 · Answer

define the perimeters and do the subtraction

anonymous · Answer

What could we eliminate based on what it says?

amistre64 · Answer

x + 8+x + 8+x - 1+x - 1
- (4x + 5+4x + 5+3x - 2+3x - 2)

anonymous · Answer

is it like this:
$\color{lime}{[2(4x+5) + 2(3x-2)] - [ 2(x+8)+2(x-1)]~}$

amistre64 · Answer

yes, B-A ... mines a little turned about

amistre64 · Answer

we could do it in half and find half the adjused perimeter :)

anonymous · Answer

is it 10x-8

amistre64 · Answer

finish the process, and it will verify itself

anonymous · Answer

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