The answer is 210 children tickets were sold . if you multiply the first equation by 7  it would be 7x+7y=2590. then subtract equation 2 from 1 you will have 4x=840 so x=210. Also you can use substitution method.
        
             
        
        
        
Answer:3
Step-by-step explanation:
 
        
                    
             
        
        
        
Stan Han Jisung!!!!!He literally cute!!hdbdbdkkdjd
 
        
        
        
Answer:
7
/10  0.7
Step-by-step explanation:
To add fractions, find the LCD and then combine.