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OpenStudy (anonymous):
the seventh term of an arithmetic sequence is 21, and the tenth term is 126. the first term is
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OpenStudy (anonymous):
Your common difference is 35, so 21-6*35 = -199, your answer.
OpenStudy (anonymous):
it was actually -189. Close though! :) Thanks!
OpenStudy (anonymous):
Haha, sorry, can't subtract today :)
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