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OpenStudy (anonymous):
What is the sum of a 12-term arithmetic sequence where the last term is 13 and the common difference is -10? answers: a) 605 b) 660 c) 748 d) 816
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OpenStudy (goformit100):
c) 748
OpenStudy (goformit100):
@kazuto it's c) 748
OpenStudy (anonymous):
thanks!
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