A theater has 30 rows of seats. If there are 20 seats in the first row, 22 in

the second, and 24 in the third. Assuming the pattern continues until the

30th row. How many seat are in the theater?

So you start off by focusing on your given information. You have 30 rows and starting with the beginning row you have 20 seats. Every row after that gains 2 seats. So your formula to find the amount of seats in the theatre is (20+2) * 30. ( * indicates multiplication). This means there are 660 total in the theatre.