Mia is working two summer jobs, making $18 per hour lifeguarding and making $10 per hour washing cars. In a given week, she can work at most 13 total hours and must earn a minimum of $180. If x represents the number of hours lifeguarding and y represents the number of hours washing cars, write and solve a system of inequalities graphically and determine one possible solution (need two inequalities as well as the coordinates please!)