20 points ! hurry what is the equation of the line in slope-intercept form?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

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?

What is the measure of angle x? answer