Answer:
I'm going to write both of these because maybe you have a fill in the blank question. I don't know.

Simplify:

Step-by-step explanation:
is the equation of a circle with center (h,k) and radius r.
You are given (h,k)=(4,5) because that is the center.
You are given r=9 because it says radius 9.
Let's plug this in.

Simplify:

The answer to your question is option d as x is positive ( making it open up), and the vertex is (-3,-4)
Answer:
Angle kjm is 56 °
you equate 7x with 3x +16
ie
3x + 16 = 7x