Answer:
Heres 2 of them....
16. So we have (x+15)^2 + (y-20)^2 = 100. So, we can see that a = -15, b = 20, and r = 10. 3. Therefore, the center of the circle would be (-15,20).
17.
Eqn of circle is: (x-h) ²+(y-k)²=r²
At (h, k) =(-1,5) and r=8 where h, k are center and r is radius.
Eqn is :(x+1)²+(y-5)²=8²
so c im pretty sure