Question

The function for the cost of materials to make a shirt is f (x)= 5/6 x +5 where x is the number of shirts. The function for the selling price of those shirts is g (f (x)), where g (x)=5x+6. Find the selling price of 18 shirts

Answer 1

find f(18)
g(f(18))=
g(5/6(18)+5)=
g(15+5)=
g(20)=
5(20)+6=
100+6=
106

selling price is $106