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If the first term in an arithmetic sequence is -3 and the tenth term is 15, what is the common difference? A. d = 2 B. d = 3 C. d = 6 D. d = 12

If the first term in an arithmetic sequence is -3 and the tenth term is 15, what is the common difference? A. d = 2 B. d = 3 C. d = 6 D. d = 12
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If the first term in an arithmetic sequence is -3 and the tenth term is 15, what is the common difference?

A. d = 2
B. d = 3
C. d = 6
D. d = 12

asked
User Gabe Shahbazian
by
8.0k points

1 Answer

3 votes

Answer:

2

Explanation:

a10=a1+(n-1)d

15=-3+(10-1)d

15+3=9d

d=2

answered
User Yue Wang
by
7.5k points
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