Mathematics, 28.09.2019 18:30 millanesjamela

An auditorium has 20 rows of seats. there are 20 seats in the first row, 21 seats in the second row, 22 seats in the third row, and son on. how manny seats are ther in all 20 rows

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An auditorium has 20 rows of seats. there are 20 seats in the first row, 21 seats in the second row,...