Suppose it took 19 riders a total of 11 days 21 hours to ride from st jospeh to sacramento. if they all rode the same number of hours, how many hours did each rider ride

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