(-5, -8)
(x, y)
would be your answer
Your equation

is in the form

The vertex only relies on "a" and "b" though, so that +9 doesn't really matter in this case. The vertex of a parabola is located where

So your x-coordinate is -1. You need to find f(-1) to find your y-coordinate, and then you list it in the form (-1, y).
Answer:
If you need any further help, feel free to let me know
Step-by-step explanation:
The answers are
(8-9)-(9+3)*5=-61
5+(5+5+6)+9=30
(5/3-3)= -4 over 3 or -4/3 or -1.3 or -1 1/3 depends on what your choices are but all those are correct
2*3+(4*2)/2=10
D because it has to be a chord due to being perpendicular to a diameter
Answer : 3r+5 hope this helps!