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.a1 = -6, d = -0.9
A. an = -0.9n - 6; a20 = -24
B. an = -6n + 5.1; a20 = -114.9
C. an = -0.9n - 5.1; a20 = -23.1
D. an = -6n - 0.9; a20 = -120.9
Answer: C
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