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FromTheMoon [43]
3 years ago
15

3. A theater has 60 seats in the first row, 68 seats in the second row. 76 seats in the

Mathematics
1 answer:
Airida [17]3 years ago
4 0

Answer:

Step-by-step explanation:

arithmetic sequence: 60,68,76,......

a = 60

d = 68 - 60 = 8

an = a + (n-1)*d

a20 = 60 + 19 * 8

      = 60 + 152

     = 112

There are 112 seats in the 20th row

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Answer:

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