Question

If f(x) = 6/x+8 and g(x) = 7/8x what is (f of g)(x)

Answer 1

Assuming that the x+8 are both under the denominator and not (6/x)+8:

Replace x in the f(x) with g(x).
f(x)=6/(7/8x + 8)

Simpify.
f(x)=
`(6)/( (7x+64)/(8) )`
f(x)=
`(48)/(7x+64)`