1. A 1200 -seat theater sells two types of tickets for a concert. Premium seats sell for $40 each and regular seats sell for $30 each. At one event $41,860 was collected in ticket sales with 10 seats left unsold. How many of each type of ticket was sold?

2. John and Ariana bought school supplies. John spent $9.40 on 5 notebooks and 6 pens. Ariana spent $7.20 on 4 notebooks and 4 pens. What is the cost of 1 notebook and what is the cost of 1 pen?

3. A group of seven golfers paid $385 to play a round of golf. Of the golfers, one is a member of the club and six are nonmembers. Another group of golfers consists of two members and one nonmember. They paid a total of $110 What is the cost for a member to play a round of golf, and what is the cost for a nonmember?

4. There are two types of tickets sold at the Canadian Formula One Grand Prix race. The price of 3 grandstand tickets and 2 general admission tickets is $1540. The price of 4 grandstand tickets and 4 general admission tickets is $2300 What is the price of each type of ticket?