The answer is 25z if you need to know how i can show you
Answer:
3
Step-by-step explanation:
The goal is to get the x to be on one side of the equation on its own.
-6x = -18
To get rid of the -6, we would have to do the opposite of what it's doing in the equation - in this case, we would divide, as it's the opposite of multiplying.
What we do to one side of the equation, we have to do to the other.
-6x/-6 = x
-18/-6 = 3
x = 3
Hope that makes sense!
Vertex is (-2,-3) and it's a minimum.
I think the answer is 78.

Sure hope this helps you
<u><em>And please mark me brianiest if this is correct</em></u>