Question

An amphitheatre has 24 seats in the first​ row, 28 in the​ second, 32 in the​ third, and so​ on, for 29 rows. How many seats are in the​ amphitheatre?

Answer 1

The answer is 2,320 seats in the amphitheater. Since the seats are increasing at a rate of 4 more seats each row, then just add 4 to the number for each past row starting at 32 since that's where the rest is unknown. Once you find all he numbers just add them up to get your answer.
I hope I helped!