The answer is 3y-7.hope this helps
 
        
        
        
It would be 100,300
Hope this helped
        
                    
             
        
        
        
5) Carol is incorrect, because the ratio of food bars to aliens is 1:3 so adding 3 aliens will result in 30, leading the amount of food bars to be 10
If you have trouble reading my writing, feel free to let me know so I can help further
 
        
        
        
The answer is 173 because you must divide 520 by 3 and you will get 173.
        
             
        
        
        
It won't be enough, because in cause in total all they want to eat 35 but there's only 32