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OpenStudy (anonymous):
A local civic theater has 22 seats in the first row and 21 rows in all. Each successive row contains 3 additional seats . How many seats are in thecivic theater
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OpenStudy (anonymous):
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OpenStudy (mathstudent55):
Row 1: 22 Row 2: 25 ... Row 21: 82 Average number of seats per row: (22 + 82)/2 = 52 Number of seats = avg x rows: 52 x 21 = 1092
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