Please answer correctly

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

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