The equations are given in triangle abc: sides ab 3x + 2y-12 = 0, heights bm x + 2y-4 = 0, heights am 4x + y-6 = 0, where m is the intersection point of heights. find the equations of sides ab, bc and heights cm

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.