Answer: B
Step-by-step explanation: x = 6
 
        
                    
             
        
        
        
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).
 
        
        
        
Step-by-step explanation:
8 is more than 2/4 because the answer of 2/4 is 0.5 so 8 is more than 2/4
 
        
             
        
        
        

First, solve the parentheses:

Next, the exponential terms

Solve the multiplication:

Add and subtract:
 
 
        
             
        
        
        
9. Wrong name for this angle: <2
10. Wrong name for this angle: <3