i am currently in college algebra and im doing inverse functions f(x) and g(x) f(x) 4x-16, g(x) x/4 +4 and im having problems with simplifying 4x-4/4 +4 can you please help

Question

anonymous · Answer

i have to substitue the 4x-16/ 4 in for gx

zzr0ck3r · Answer

f(x) = 4x-16
lets call this y = 4x - 16
now we want to solve for x in terms of y
add 16 to both sides
y+16 = 4x
now devide away the 4
(y/4)+4 = x
so
now "switch the x and y"
(x/4) + 4 = y
f(x) inverse is f^(-1)(x) = (x/4) + 4

anonymous · Answer

ok i think i understand but im doing one to one functions to see if they inverses of each other

anonymous · Answer

pluging one function in for the other