Answer:
B
Step-by-step explanation:
y=n(x+5)(x-3)
or y=n(x²-3x+5x-15)
or y=n(x²+2x-15)
=n(x²+2x+1-1-15)
=n(x+1)²-16n
y -coordinate of vertex=-16n
That is a simplified as it can get.
20
10 percent = 2 (for this problem anyways)
So the remaining amount is 8, which leaves us with 12.
