Answer:

Step-by-step explanation:
The equation of a circle with center (h,k) and radius r is given by the formula;

Given (h,k)=(0,0) and r=4, we substitute the values to obtain;

The required equation is

Answer:
11
Step-by-step explanation:
Answer is C or A either one I believe it could be......
Answer: y=-4x+1
Step-by-step explanation: