Tickets to a concert cost $2 for children and $5 for adults. if 630 people attended the concert and the ticket sales totaled $2,910, how many children attended the concert?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?