# Math (12th)

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What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18, ...

• Math (12th) -

Have you tried subtracting?

• Math (12th) -

Thank you. I tried that and got 3 :)

• Math (12th) -

Right.

• Math (12th) -

algebra2

• Math (12th) -

-3

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