Respuesta :
k(p(x)) just means to put the function p(x) in where the x is in the function k(x).
k(p(x))=5(x-4)-8
k(p(x))=5x-20-8
k(p(x))=5x-28
k(p(x))=5(x-4)-8
k(p(x))=5x-20-8
k(p(x))=5x-28