Answer:
   239
Step-by-step explanation:
Write the equation. Fill in the given values, and solve for the unknown,
   z = k√x
   717 = k√9
   k = 717/3 = 239
The constant of proportionality is 239.
 
        
                    
             
        
        
        
Answer:
The answer is 4 minutes
Step-by-step explanation:
I divided 825 by 3 and got 165. If you multiply 165 by all the factors, you get approximately 4 minutes. It's the closest. Try that one.
 
        
             
        
        
        
Whats the rest of the problem?
        
                    
             
        
        
        
Answer:
7x+9
Step-by-step explanation:
f(x)=7x-5 
 g(x)=x+2
 f[g(x)]=  Substitute g(x) in for x in the function f(x)
            =7(g(x))-5
           = 7( x+2) - 5
Distribute
            = 7x+14 - 5
Combine like terms
            =7x +9