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 = -9, d = -0.5
A. an = -9n + 8.5; a20 = -171.5
B. an = -0.5n - 8.5; a20 = -18.5
C. an = -9n - 0.5; a20 = -180.5
D. an = -0.5n - 9; a20 = -19
Answer: B
Mathematics
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