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OpenStudy (anonymous):
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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OpenStudy (anonymous):
helllllllp
OpenStudy (anonymous):
ok... Hi!
OpenStudy (anonymous):
hi
OpenStudy (anonymous):
? @ayanna1100
OpenStudy (anonymous):
okay then. can someone else please help I have limited time
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OpenStudy (welshfella):
first term = a1 = -3 tenth term = a1 + 9d = 15 so 15 = -3 + 9d solve for d
OpenStudy (welshfella):
because nth term of an AS = a1 + (n-1)d
OpenStudy (anonymous):
ok so a. thanks!
OpenStudy (welshfella):
right yw
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