Find the answers for the following two questions 400 + 20 = ?
60 + 9 = ?

(psstenjoy the points)​

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.