What is the common difference in the arithmetic sequence 30, 27, 24, 21, 18,
a. -1 c. 3 b. -3 d. 30

Step-by-step explanation:

The common difference in an arithmetic sequence:

27 - 30 = -3

24 - 27 = -3

21 - 24 = -3

18 - 21 = -3

CORRECT :)

It's constant.

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step-by-step explanation: