4th one is defo right so it’s one of the rest
Answer:the answer is 90 u welcome text me back if wrong armstrongtamarion
Step-by-step explanation:
We have been given an equation of circle
. We are asked to find the center and radius of the circle.
First of all, we will write equation of circle is standard form
, where center of circle is at point (h,k) and radius is r.
Let us complete the square for both x and y.


Adding half the square of coefficient of x and y term, we will get:





Therefore, the center of the circle is
and radius is 4 units.