Alex leaves home, travels 5 miles east, and arrives at the library. he leaves the library and travels 3 miles north to a friend's house. this trip can be plotted on the coordinate plane, where home is the point (0,0). alex wants to find out how far his house is from his friend's house and uses the distance formula. which other formula can he use?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?