Which of the following quadratic equations has the solution set {−20,9}?

A. x^2 - 9x + 20 = 0
B. x^2 - 11x + 180 = 0
C. x^2 + 11x - 180 = 0
D. (x + 20) (x - 9) = 0
E. (x - 20) (x + 9) = 0
F. (x - 5) (x - 4) = 0

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