What is the GCF of 20 and 28 and how please show a full reason why

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Does the point (1, sqrt 7) lie on circle shown.

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