Question

I need help with 2 questions please. Thank you.

Answer 1

Hello!

Question 1
The equation of a circle is

(x - a)^2 + (y - b)^2 = r^2

(a, b) is the center

The answer is C) (x + 6)^2 + (y - 7)^2 = 81
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Question 2
We have to find the radius


`r = √((xsub2 - xsub1)^2 + (ysub2 - ysub1)^2)`

sub 1 is the point
sub 2 is the center


`r= √((-6 - 0)^2 + (-8 - 0)^2)`


`r = √(36 + 64)`

r = 10

The radius is 10

The answer is D) (x + 6)^2 + (y + 8)^2 = 100

Hope this helps!