A chef is estimating the cost to prepare a fixed-price menu for x guests. The anticipated cost of the appetizers is a(x)=3.25x. , the anticipated cost for the main course is m(x) = 5.25x , and the anticipated cost for the dessert course is d(x)=1.25x. If the functions are combined so that c(x) = a(x) + m(x) + d(x) then the function c(x) includes the point (40, ? )
