Hello,
Answer is Dsince y=k(x-2)²-5 and if k=1 ==>D.
If the width is 12 and the length is 18, the perimeter of the rectangle is 12 + 12 + 18 + 18, or 60. So yes the perimeter can be 60.
given: 
$\therefore Ac=\frac{(2)2}{2}=2$
Well first you times the 0.3 to w and 10 which will give you 0.3w + 3 = 1.8w and subtracting 1.8 from 0.3 gives you
1.5w=3 and that is divided to w=2
The answer is B it best explains the definition of output