You are right. In circle equation we have =r² so the correct answer will be C od D. But we have to calculate the center of a circle.

Complete the square:

And we have:

So the answer is C (the same left side of equation).
Answer:
8<em>x</em> + 25
Step-by-step explanation:
In the second photo.
The answer is 1/4 as 3/4-2/4 is 1/4
No (4,11) it’s a solution of the system