Answer:
A) 1
Explanation:
We want to find G such that ...
(G-F)/(D-G) = 8/5
5(G-F) = 8(D-G)
5G -5F = 8D-8G . . . . eliminate parentheses
13G = 8D +5F . . . . . . add 5F +8G to both sides
G = (8D +5F)/13 . . . . divide by the coefficient of G
G = (8(-4) +5(9))/13 = (-32 +45)/13 = 13/13
G = 1 . . . . . . matches choice A