Answer:
Usually it's in standard form: ax²+bx+c 
or vertex form: y=a(x-h)²+k
If you put the graph into a graphing calculator it's going to look like a hill/depression.
Step-by-step explanation:
Standard form ex: 3x²+2x+1
Vertex form ex: y=4(x-1)²-2
 
        
                    
             
        
        
        
I can't show you the square root but this is the answer simplified. 4 square roots of 6
        
             
        
        
        
Answer: Ann = 67 Josh = 60 Claire = 30
Step-by-step explanation: You get the equation 5x+7 = 157. You get the equation because for example, Claire = x then josh = 2x and Ann = 2x + 7. You do all the math and boom! You get the answer :)
 
        
             
        
        
        
Radius times 2 = diameter which would be 10 times 3.14 is 31.4 so it’s 31.4