PLEASE HELP BEEN STUCK FOR HOURS!!

An auditorium has 30 rows of seats. The first row has 20 seats, the second row has 22 seats, the third row has 24 seats, and so on. What is the total seating capacity of the auditorium?

1,200

1,470

1,530

1,640

Question

PLEASE HELP BEEN STUCK FOR HOURS!!



An auditorium has 30 rows of seats. The first row has 20 seats, the second row has 22 seats, the third row has 24 seats, and so on. What is the total seating capacity of the auditorium?

1,200

1,470

1,530

1,640

anonymous · Answer

20 + 22 + 24 + 26 + 28 + 30 + ... (20+2*29)

anonymous · Answer

someone allready asked that http://openstudy.com/study#/updates/54538cdde4b0a717ff60ab4e

anonymous · Answer

or (20 + 29*2)  what ever is easiers i guess

anonymous · Answer

hahaa i used a calculater this time lol k its the 2nd one promise this time.  2. 1470

anonymous · Answer

@thomasgow9797