a stadium with 80 rows has 20 seats in the first rows,30 in the second,and so on.how many total seats are in the stadium​

Question

a stadium with 80 rows has 20 seats in the first rows,30 in the second,and so on.how many total seats are in the stadium​

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Vân Khánh 1 year 2021-09-04T09:42:16+00:00 1 Answers 21 views 0

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    2021-09-04T09:43:51+00:00

    Answer: there are 2,000 seats in total

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )