Find the sale price if an item selling for $10 is discounted 20%

Factor this polynomial completely x^2-64

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10