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A section in a stadium has 20 seats in the first row, 23 seats in the second row, increasing by 3 seats each row for a total of 38 rows. How many seats are in this section of the stadium?

Please explain using words, numbers, and formulas.

2 answers

Recall that Sn = n/2 (2a+(n-1)d)

2869 seats

Heh 69

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