Anna is considering writing and publishing her own book. She estimates her revenue equation as R=6.37x, and her cost equation as C=10,071+1.08x, where x is the number of books she sells. Find the minimum number of books she must sell to make a profit.

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?