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What expression is equivalent to 1/2(2+3x-6)

Me with this one question, and i'll upvote the brainliest answer

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?