10, 8, 6, 4...
What is a20 in this arithmetic sequence?
A) -32
B) -30
C) -28
D) -26
E) -24
Nth term = F + D*(N - 1), where F = First term, D = Common difference, N = Term Number
20th term=10 + -2 * (20 - 1)
=10 - 2*19
=10 - 38
= - 28
+1982 
