To evaluate functions, simply plug in the values which are provided in order to get an output.
Remember that f(x), g(x), v(x), any letter of the English Alphabet times x, essentially equals y. Meaning, say, "f(x)" is the same thing as saying "y." For example, f(x)=2x quite literally means y=2x.
when x=-3,0, and 4
25. g(x)=6x
g(-3)=6*-3
g(0)=6*0
g(4)=6*4
26. h(x)= -10x
h(-3)= -10*-3
h(0)= -10*0
h(4)= -10*4
27. f(x)=5x-8
f(-3)=(5*-3)-8
f(0)=(5*0)-8
f(4)=(5*4)-8
28. v(x)=14-3x
v(-3)=14-3*-3
v(0)=14-3*0
v(4)=14-3*4