Answer:
Whatever the base of the shape is, that's the answer
Step-by-step explanation:
For example: a triangular prism cut through parallel to the base would be a triangle
First you plug everything in to get
2a=-5 (1)^2+9 you do the powers and multiply
2a=-5 (1)+9
2a=-5+9
2a=4
a=2
The variable in equations are always the letters so the variable in this equation is y