4w +8. C.
It’s 4 * width for perimeter and two of the sides are longer by 4in so 2*4=8
Your factors are (x+7)(x-5)(x+3)
multiply the first 2 to get (x^2 + 2x - 35)(x+3)
Now multiply in the 3rd one
x^3 + 2x^2 - 35x + 3x^2 + 6x - 105 now combine like terms
x^3 + 5x^2 -29x - 105 or A
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Step-by-step explanation:
