Question

center (-9,-8), r=10

Answer 1

\[(x-h)^{2}+(y-k)^{2}=r^{2}~.~~~(h,k)~~~is~~~the~~~center,~~~r~~~is ~~~radius.\]

Answer 2

plug in your values
h=-9
k=-8
r=10

note that -h=positive 9 and -k=positive 8

Answer 3

Are we ask to find equation of circle ?