Luke is keeping track of the total number of hours he exercises. he started the summer having already put in 15 hours, and he then exercises 7 hours each week. the function to keep track of his exercise is f(x) = 7x + 15. what do the f(x) and x represent in luke's situation?

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Which shows the graph of the solution set of 3y – 2x > –18?