Answer: The answer is (-7,12)
Step-by-step explanation:
 
        
             
        
        
        
Process: 
1. 21+24n= 7 
2. 24n= 7 - 21
3. 24n= -14 
Answ: n= -7/12
        
             
        
        
        
The equation of a circle with center 
 and radius 
 is

In your case,

Plug these values into the generic formula and you'll get your equation.
 
        
             
        
        
        
D=2x+2
X=7
Plug in the value for Max's age.
D=2(7)+2
D=14+2
D=16
Max is 7
Dee is 16
 
        
                    
             
        
        
        
Answer:
25.4 students in each class
Step-by-step explanation:
178/7 = 25.4285714286 rounded up to 25.4