Your question is vague. There is not enough information. How many balls are in the box? 15 boxes would cost 109.80 thought.
        
             
        
        
        
Answer:
11) Irrational number
12) Integer
13) Communitive property of addition 
14) Distributive property of addition and multipacation
15) 26
16) 8
17) -41
18) 65
19) -5x-20 
Step-by-step explanation:
Hope I helped
 
        
             
        
        
        
You do the reverse and divide the 2 values to find out the last one
72/9 = 8
Do you get it?
        
                    
             
        
        
        
Answer:
x=3
Step-by-step explanation:
 
        
                    
             
        
        
        
Hi! 
The answer is 9749821. 
I did 9809821 - 6000.
I hope this answer helps!
I would love it if you helped me with my question too!