Emily is a songwriter who collects royalties on her songs whenever they are played in a commercial or a movie. Emily will earn $40 every time one of her songs is played in a commercial and she will earn $120 every time one of her songs is played in a movie. Emily earned a total of $600 in royalties on 11 commercials and movies. Graphically solve a system of equations in order to determine the number of commercials, x, x, and the number of movies, y, y, on which Emily's songs were played.

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes