Question

Please help

Assume f(x) = 4x + 8 and g(x) = 5, what is (gof)(-1)?

Answer 1

$\text{Let}\ f(x)=4x+8\ \text{and}\ g(x)=5.\\\\(g\ \circ\ f)(x)=5\\\\\text{Therefore}\ (g\ \circ\ f)(-1)=5$