The answer you're looking for is 40 tennis balls.
Hope this helped!
        
             
        
        
        
Answer:
(-x)(x^2 + 4x + 5)
Step-by-step explanation:
You have to factor out the -x from the rest of the expression.
 
        
             
        
        
        
Answer:
37.5
Step-by-step explanation:
16/46 = 20/(20+x)
or, 16(20+x) = 46×20
or, 320 + 16x = 920
or, 16x = 600
or, x = 600/16
 x = 37.5
 
        
             
        
        
        
Answer:
Step-by-step explanation:
Hope this helps :D