Which statement verifies that f(x) and g(x) are inverses of each other? f(g(x)) = x f(g(x)) = x and g(f(x)) = –x f(g(x)) = g(f(x)) f(g(x)) = x and g(f(x)) = x

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18