Circle O is represented by the equation (x + 7)^2 + (y + 7)^2 = 16. What is the length of the radius of circle O?
Accepted Solution
A:
Answer:4Step-by-step explanation:The standard form of a circle is:(x-h)^2+(y-k)^2=r^2where (h,k) is the center andr is the radius.You compare your equation to mine you should see that:-h=7 implies h=-7-k=7 implies k=-7r^2=16 implies r=4 since 4^2=16The center is (-7,-7). The radius is 4.