Janet can wax her car in 2 hr(s). When she works together with Helga, they can wax the car in 45 min(s). How long would it take Helga, working by herself, to wax the car?

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120