Five times a number added to twelve is nine times the number

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

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?