SOLUTION: Find the missing term of the following arithmetic sequence.    3 ,___ ,31 also the last thing i need is the answer to this: Find the 14th term in an arithmetic

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Question 1054410: Find the missing term of the following arithmetic sequence.
  
3 ,___ ,31
also the last thing i need is the answer to this:
Find the 14th term in an arithmetic sequence: A(subscript)15= -4, d=-8
i dont need a tutorial i just need the answer for homework, i get to do study sessions on fridays and wedensdays (tomorrow)

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
17
3,17,31, difference is 14.
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If a14=4, and difference is -8, a15=-4
4