Question

(x - 3)2 + (y + 7)2 = 121 what's the radius

Answer 1

`r=11`

Explanation:

The equation of a circle is commonly denoted as:

`(x-h)^2+(y-k)^2=r^2`, where
`(h, k)` is the center of the circle.

This equation is already written in that format, therefore:

`r^2=121,\\r=\fbox{$11$}`,