71.19 divide by 6.3 I need help pleas or else I get have credit and who wants half credit right

For which pairs of functions is (f•g)(x)=12x? f(x)=3-4x and g(x)=16x-3 f(x)=6x2 and g(x)= 2/x f(x)= and g(x) = 144x f(x)=4x and g(x) =3x

Write 5 in the form of a/b using integers to show it as a rational number

This sucks i am not a membership person! take my points