it is a linear equation
if you take the negative of x and subtract 1 you get Y
so the answer is A
The like terms are 16x and 2x
Notice the picture below, see the length "l"?
well
![\bf Area=l\times w\qquad \begin{cases} l=\frac{11}{4}w\\ Area=180 \end{cases}\\\\ -----------------------------\\\\ thus \\\\ 180=\cfrac{11}{4}w\times w](https://tex.z-dn.net/?f=%5Cbf%20Area%3Dl%5Ctimes%20w%5Cqquad%20%0A%5Cbegin%7Bcases%7D%0Al%3D%5Cfrac%7B11%7D%7B4%7Dw%5C%5C%0AArea%3D180%0A%5Cend%7Bcases%7D%5C%5C%5C%5C%0A-----------------------------%5C%5C%5C%5C%0Athus%0A%5C%5C%5C%5C%0A180%3D%5Ccfrac%7B11%7D%7B4%7Dw%5Ctimes%20w)
solve for "w", to find the width,
what's the length? well, l = 11/4 w
Proportion
3 parts milk. 12cups
2 parts sugar X
8 cups sugar
check the picture below.
![\bf \stackrel{f(x)}{0}=-16(x^2-6x-7)\implies 0=x^2-6x-7 \\\\\\ 0=(x-7)(x+1)\implies x= \begin{cases} \boxed{7}\\ -1 \end{cases}](https://tex.z-dn.net/?f=%20%5Cbf%20%5Cstackrel%7Bf%28x%29%7D%7B0%7D%3D-16%28x%5E2-6x-7%29%5Cimplies%200%3Dx%5E2-6x-7%20%5C%5C%5C%5C%5C%5C%200%3D%28x-7%29%28x%2B1%29%5Cimplies%20x%3D%20%5Cbegin%7Bcases%7D%20%5Cboxed%7B7%7D%5C%5C%20-1%20%5Cend%7Bcases%7D%20)
it cannot be -1, because is a seconds amount after moving.