Find the original price of a salt lamp that is $63 after a 30% discount

What are the soultion(s) to the quadratic equation 40- x^2=0

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?

Plz hurry evaluate the expression a+b where a=8 and b=19