PLEASE HELP AND HURRY over due and due at 12

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?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?

Simplify this expression. 8x 16(x + y)