Assume f(x)=4x-8 and g(x)=5 what is the value of (f+g)(2) this is hard. ive tried, but i cant do this. Assume f(x)=4x-8 and g(x)=5 what is the value of (f+g)(2) this is hard. ive tried, but i cant do this. 5/27/2013 | Erica from Compton, CA | 2 Answers | 0 Votes