SAT Math Practice- Be sure to know how to do these questions!

  1. 3x-4y=24 What is the slope of a line perpendicular to the line above?
  2. 8x+4y=12 What is the slope of a line perpendicular to the line above?
  3. 3x+15y=18 ; mx+5y=2 In the system of linear equations above, m is a constant. If the system has no solution, what is the value of m?
  4. 2x+4y=6 ; gx+12y=13 In the system of linear equations above, g is a constant. If the equations are parallel, what is the value of g?
  5. 4x+2y=6 ; 8x-3y=-37 Based on the system of equations above, what is the value of the sum x+y?