If f(x) = 2x and g(x) = x-4, what is the value of f[g(3)]?

-6
-2
0
6
2

Question

If f(x) = 2x and g(x) = x-4, what is the value of f[g(3)]?

 -6
 -2
 0
 6
 2

anonymous · Answer

i think your suppose to solve for g(x) first by plugging in the 3 to get -1. then you would plug the -1 into f(x)2(-1) to get -2
so your answer would be -2

anonymous · Answer

candygirl7655 i dont get ur question :(

campbell_st · Answer

find g(3) so if g(x) = x - 4 then g(3) = 3 -4  g(3) = -1

the find f(-1)

anonymous · Answer

lol me either its okay :)

campbell_st · Answer

its just a case of substitution... if g(x) replace x with 3 and solve... 


then using that answer... in f(x) replace x with -1 and solve

anonymous · Answer

hey campbell  can u help me with mine

campbell_st · Answer

what's your question

anonymous · Answer

i have it posted

anonymous · Answer

http://openstudy.com/study#/updates/4ff8b28fe4b058f8b7632ef4