How to show the work for 0.63 kilometers

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?

W-16=-12 solve each one step equation plz

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.