Answer:
Step-by-step explanation:
Combine each term of each equation:
Solve for y:
The answer should be 21 because the other answers do not make sense. Additionally, if you multiply 21 by 2 since 21 shots were made and each shot was worth 2 points, you would get a total of 42 points.
The vertex of f(x)=-x2+4x-8 is (2, -4)