Answer:
(h,k) shows the coordintes of the turning point.
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
The standard form of a quadratic is  . You need to subtract the x^2 from the right to set the quadratic equal to 0. Then a,b, and c are equal to the values of the coefficients in front of the terms.
. You need to subtract the x^2 from the right to set the quadratic equal to 0. Then a,b, and c are equal to the values of the coefficients in front of the terms.
If this helped, a brainliest would be greatly appreciated!
 
        
             
        
        
        
Answer:1385.44mm sq
Step-by-step explanation: surface area of a circle = pi x radius squared 
3.142 x 21 squared 
 
        
                    
             
        
        
        
5*23 
Note 23 = 20 + 3
5*23 =  5*(20 + 3)        and by distributive property
5*23 =  5*20 + 5*3 = 100 + 15 = 115
= 115