Answer:The answer to your question is:Step-by-step explanation:24.- y = 5x - 6 x + 5y = 5 5y = - x - 5 y = -(1/5) x - 1Because of the slopes "5" and "-1/5" the lines are perpendicular.25.- 2x + y = 10 y = -2x + 10 slope = -2 -6x - 3y = 3 -3y = 6x + 3 y = -2x - 1 slope = -2 x - 2y = 8 -2y = - x + 8 y = (1/2) x - 4 slope = 1/2Lines a and b are parallels and perpendicular to c