It's the right angle. The circumcenter is in half of hypotenuse.
The formula of a midpoint of segment BC:

We have the points B(-2, -2) and C(7, -5). Substitute:

Answer: (2.5, -3.5)
It is 3468 Bc the other choices don’t make sense
The median is 12.
The arithmetic mean is 12.7
The geometric mean is 11.3