Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.20, 13 , 6, -1, . . .
A. an = 20 - 7n; a20 = -120
B. an = 7n - 20; a20 = 120
C. an = 7n - 27; a20 = 113
D. an = 27 - 7n; a20 = -113
Answer: D
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A. -1, negative B. 1, positive C. -1, positive D. 1, negative
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hours on the first day and 1
hours on the second day, how many hours would he need to train on the third day?
A. 6
hr
B. 6
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D. 6
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A. {-3 + 
, -3 - 
B. {-3, 2}
C. {-2, 3}
D. {2 + 
, 2 - 
}