What is the product of? (7x^2)(2x^3+5)(x^2-4x-9)

Find the cosine function that is represented in the graph.

Ihave trouble finding the nth term of a linear sequence

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