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20th term of 12, 15, 18, 21

20th term of 12, 15, 18, 21
asked 117k views
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20th term of 12, 15, 18, 21

asked
User Kolar
by
8.5k points

1 Answer

4 votes

Answer:

69

Explanation:

The rule: 3n+9

n=20

3(20)+9

60+9

69

answered
User Ian Moote
by
8.3k points
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