Math
posted by Anonymous .
the first row in a theater has 8 seats. each subsequent row has 3 more seats than the row before it. there are 10 rows in the orchestra section. how many seats are in the orchestra section?

each time you move to the next row you should add 3 to the row before it.
8+11+14+17+20+23+26+29+32+35=215 seats