The river ridge high school auditorium has exactly 27 rows of seats. the rows are labeled, in order, from the front of the auditorium to the back from a through aa. there are 9 seats in the row a. each row after the first row has three more seats than the previous row. how many seats are there in row aa?

  87

Step-by-step explanation:

The numbers of seats in each row form an arithmetic sequence. The general term (an) of such a sequence is given in terms of the initial value (a1) and the common difference (d) as ...

  an = a1 + (n-1)·d

The 27th term of the sequence with first value 9 and common difference 3 is ...

  a27 = 9 + (27-1)·3 = 9 +78 = 87

There are 87 seats in row AA.

it could be a ..idk tho

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above