<h2>Equations of Circles</h2>
Generally, you'd see the equation of a circle organized in the following format:

is the center
is the radius
To determine the equation given the center and the radius:
- Plug both pieces of information into the general equation
- Simplify
<h2>Solving the Question</h2>
We're given:
- Radius: 99
- Center: (-1,-8)
Plug the radius and center into the equation as r and (h,k):

<h2>Answer</h2>

<u>Slope -2/5.</u>
Answer:
Solution given:
(x1,y1)=(0,0)
(x2,y2)=(-2,5)
now
slope =(x2-x1)/(y2-y1)=(-2-0)/(5-0)=-2/5
Answer:
r = 9 that's your answer.
Hope it's correct, appreciate if you could let me know
Step-by-step explanation: