Which expression is equivalent to (3x2-7)

How many $20 bills do you need to have to make $280

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?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?