Answer:
 --- Vertex
 --- Vertex
 --- Axis of symmetry
 --- Axis of symmetry
Step-by-step explanation:
Given

Solving (a): The vertex
For an equation written in

The vertex is:

By comparison:
 and
  and 
 
       
 
          
  
So, the vertex is:

Solving (b): The axis of symmetry
For an equation written in

The axis of symmetry is:
x = h
In (a):

So:

 
        
             
        
        
        
The answer would be 8.5. 8.54 rounds down to 8.54. 
Hope this helps!
Can u plz mark me as brainliest?
        
                    
             
        
        
        
Number of possibilities for 1 roll = 6.
Probability of rolling a 4 = 1/6. .
Odds are 5 to 1 against it. 1 to 5 in favor.
        
                    
             
        
        
        
area of a circle is PI x r^2
2 = d/2 = 5.4/2 = 2.7 cm
 using 3.14 for PI
3.14 x 2.7^2 = 22.89 square inches
360 degree in a circle, shaded area is 180 degree, which is 50%
 so 22.89 x .5 = 11.45 cm^2