Classify by degree of polynomial 9x

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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?

Which concept can be used to prove that the diagonals of a parallelogram bisect each other?