Answer:
x^2-6x-2
Step-by-step explanation: i am 100% sure 
 
        
             
        
        
        
K is equal to 2. 
You have to move the 4 to the other side and change the addition sign to subtraction. After that, you have to subtract 8 and 4 which will give you 4 and 4 divided by 2 is 2 which means that k equals 2.
 
        
                    
             
        
        
        
Answer:
jajaja y la novia
Step-by-step explanation:
 
        
             
        
        
        
The center of the circle is expressed as (h,k) in the standard form  of equation. In this case, the diameter endpoints are <span>(-3, 8) and (7, 4). Hence the circle center has coordinates which are the midpoints of the two points. 
x = (-3 + 7) /2  = 2
y = (8 + 4) /2 = 6 
hence the center of the circle is (2,6)</span>
        
             
        
        
        
Sin of K is opp/hyp so the answe is a.12/13