Find an equation for the nth term of the arithmetic sequence. -15, -6, 3, 12, ... A. an = -15 + 9(pi + 1)
B. an = -15 x 9(pi - 1)
C. an = -15 + 9(pi + 2)
D. an = -15 + 9(pi - 1)

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.