Help please ASAP

If rt is greater than ba, which statement must be true ?

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?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?