Answer:
I'm not so sure about this one so sorry if this is wrong 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Just see how are they alike and differents
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
20a³
Step-by-step explanation:
Simply multiply:
-5(-4) = 20
-a(-a)(a) = a²(a) = a³
20a³
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
2000264(X) b x a =177777082