Charley Davis is 1/4 as old as his father. The sum of their ages is 45. How old is each person?

The production line where you work can assemble 5 appliers every 30 minutes at this rate how long should it take the line to assemble 125 amplifiers

Solve the system of equations. y= 2x y= x^2 - 15

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes