18. At a store, a pack of six turkey burgers costs $5.00. A pack of six buns costs $3.00. One pack of turkey burgers and
one pack of buns serve one table of people at Tessa's barbecue. Iff) = 5x represents the total cost of x packs of
turkey burgers and if g(x) = 3x represents the total cost of x packs of buns, which function can Tessa use to determine
the total cost of servingx tables of people at her barbeque?
A. (x)=f(x) -9(x) B1(x) =F ch(x) = f(s) +g(x) D. (x) = f(x) - g(x)