How many zeros does the polynomial function P(x) = 3x4+4x-8 have?

Mary had at least an 80% on her test write an inequality to represent this situation

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

Which formula can be used to describe the sequence? -81 ,108,-144,192