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posted by CC Monday, November 26, 2012 at 12:19pm.
A theater has 43 seats in the first row, 47 seats in the second, and 51 seats in the third row. How many seats are there in row 17
term(1) = 43 term(2) = 47 a = 43 , d = 4 term(17) = a + 16d = 43 + 16(4) = 107
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