PLEASE HELP Find the center and radius of the circle given by this equation:
x2 – 10x + y2 + 6y – 30 = 0

Ineed i been stuck on this question since yesterday

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.