A theater has 30 seats in the first row, 33 seats in the second row, 36 seats in the third row, and so on in the same increasing pattern. If the theater has 15 rows of seats, how many seats are in the theater?
a.765
b.775
c.810
d.840

Question

A theater has 30 seats in the first row, 33 seats in the second row, 36 seats in the third row, and so on in the same increasing pattern. If the theater has 15 rows of seats, how many seats are in the theater?
a.765
b.775
c.810
d.840

anonymous · Answer

@Ballin_24

anonymous · Answer

alright more math jk (;

anonymous · Answer

i have like 3 more questions like this. 
and idk how to solvee it, ineed a tutor. ill ask her tmr tho.

anonymous · Answer

lol im doing the math right now just alot of work

anonymous · Answer

yess it is!!!!!!

anonymous · Answer

Just add the progressive rows together
30 +33+36 
do that 15 times

anonymous · Answer

The answer is A.

abmon98 · Answer

s= n/2(2a+(n-1)d) 
15/2(2(3)+(14*2)