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OpenStudy (anonymous):
Please Help, Very Stuck
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OpenStudy (anonymous):
What is the sum of the arithmetic series (-15)+0+15+30+...+195
OpenStudy (anonymous):
1,355 1,350 1,335 1,000 are my options. i think its C
OpenStudy (anonymous):
First, you need to find out how many numbers does the sequence contain by using this formula: an = a1+(n-1)d
OpenStudy (anonymous):
i honestly have no idea how to do any of this..
OpenStudy (anonymous):
Nvm i got it..
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OpenStudy (anonymous):
The answer is B
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