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What is the common difference of the sequence 3, 12, 21, 30, 39? A. 4 B. 11 C. 10 D. 9
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What is the common difference of the sequence 3, 12, 21, 30, 39?

A. 4
B. 11
C. 10
D. 9

User Ling
by
4.8k points

2 Answers

4 votes

Answer:

(d)-9

Explanation:

12 – 3 = 9, 30 – 21 = 9, etc.

User Merly
by
5.3k points
0 votes

Explanation:

3 + 9 = 12,

12 + 9 = 21,

21 + 9 = 30,

30 + 9 = 36.

The common difference is 9. (D)

User Flossfan
by
6.0k points
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