I don’t really know what to do, can someone help me?

Select the graph of the solution. click until the correct graph appears. |x| = 3

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?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g