4/8 -2/8 = help me simplify the answer help plzz

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.