Answer:
The value of a is 
The equation is 
Step-by-step explanation:
we know that
The function of a vertical parabola written in vertex form is equal to

where
(h,k) is the vertex of the parabola
in this problem we have

substitute in the equation

Find the value of the coefficient a
Substitute the value of x and y of the point  in the equation
 in the equation




The equation is equal to
 ----> is a vertical parabola open downward
 ----> is a vertical parabola open downward
 
        
                    
             
        
        
        
Answer: -30
Step-by-step explanation:
My answer is correct because, All you have to do is subtract all the numbers by 11 and the one that has the sum -19 is the correct choice. In this case -30 does and we can make sure were orrect by subtracting 11 by -19 and that equals -30.
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Answer:
1/n^12 or n^-12
Step-by-step explanation:
=n^-10 / n^2
=1/n^10 / n^2
=(1/n^10) *(1/n^2)
=1/n^12
 
        
             
        
        
        
Answer:
30.4m
Step-by-step explanation:
Diameter(D) = 2r (radius)
D = 9.7m
r = 9.7m / 2 
 = 4.85m
C = 2πr 
 = 2π × 4.85m 
 = 30.47344873982099m 
rounding - Leave it as is if the digit in the tenth is 4 or lower
 - round it up if it's 5 or higher.
 ~~ 30.4m
 
        
             
        
        
        
Answer:
?
Step-by-step explanation:
where are the options?