Can some one please help cause I don't understand it

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge