Answer:
C
Step-by-step explanation:
Cuz I'm guessing I want the points :p
X^2 + 3x - 6
This is because x^2 and 3x have nothing they can combine with, leaving them as their own number. 1 + - 6 will give you -5 as adding to a negative only reduces not adds entirely.
Hope this helps!
Volume of right triangular prism is bxhxL/2
So here it is 5x12x16/2 = 480