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Answer: 
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n starts at 1, and n is a positive whole number (1,2,3,...)
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Explanation:
The sequence is arithmetic with first term 40 and common difference 10. Meaning we add 10 to each term to get the next one.
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a1 = 40 = first term
d = 10 = common difference

is the general nth term of this arithmetic sequence
Plug in n = 1 and you should get 
Plug in n = 2 and you should get 
and so on
8-10=-2
-2+5=3
3+7=10
10-(-20)=-10
Final score is -10 points
<span>The factors of 16 are 1, 2, 4, 8, and 16.</span>