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Mathematics, 04.03.2021 16:20 koryn4880

HEELP! NEED WORK! A stadium with 75 rows has 10 seats the 1st row, 15 in the 2nd, 20 in the 3rd and so on.
How many seats are in the 75th row? How many seats are in the stadium?

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HEELP! NEED WORK! A stadium with 75 rows has 10 seats the 1st row, 15 in the 2nd, 20 in the 3rd and...

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