What is -5.25 to the nearest tenth?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

What expression is equivalent to 42x-56y

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?