Answer:
See like terms have the same variables 
E.g 2x+4y-x+7y
We should take the same variable together with the same signs so here 
2x-x will be 1x 
4y+7y will be 11 y 
So x+11y 
Hope it helps! 
 
        
             
        
        
        
Answer:15
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
It has a negative rate of change.
Step-by-step explanation:
She is losing money so the rate of change is negative