Answer:
60
Step-by-step explanation:
because half of children is 50. 120÷50=60
 
        
                    
             
        
        
        
Answer:
k = 4
Step-by-step explanation:
Given that a varies directly as b then the equation relating them is
a = kb ← k is the constant of variation
To find k use the condition a = 8 when b = 2
k = 
 = 
 = 4
 
        
                    
             
        
        
        
Answer:
8,107,424
Step-by-step explanation:
The 8,000,000 would stay the same, but the second zero would be switched by a one. The third number would still just be a zero. The other zero would turn into a seven, and the last three numbers would be 4, 2 and 4. You can also find the number by adding.
 
        
                    
             
        
        
        
7) y = 4x
8) y = 7x/8 
9) y = 25x/3
I think this are the answers.