Which phrase describes the variable expression z+8

Collin did the work to see if 10 is a solution to the equation r/4=2.4

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?

If angle ase measures 168 degrees, find the measure of angle dse. the figure mag not be drawn to scale