Mathematics, 02.07.2019 21:00 dinadenoirefan

An auditorium has 40 rows of seats. there are 20 seats in the first row. each row has 2 more seats than the row before. how many seats are in the auditorium?

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An auditorium has 40 rows of seats. there are 20 seats in the first row. each row has 2 more seats t...

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