Answer: B

Given the equation f/g + (f - g)/2 and the expression 6*(-3), recognize that f = 6 and g = -3, then plug in those values:
6/(-3) + (6 - (-3))/2
= -2 + 9/2
= -4/2 + 9/2 = 5/2 = 2.5, choice (B).