SAT Prep

Category - Math

If x and y are integers, how many ordered pairs (x,y) are the solutions of the system of linear inequalities?
x>0
y>0
− x − 4y + 24>0
3x + y − 17<0
  1. 5
  2. 10
  3. 15
  4. 20
  5. 25
Explanation
Answer: D - Twenty ordered pairs are the solutions of the system of inequalities. Solve each inequality graphically and then compose all graphs into one graph.
x>0,y>0

− x − 4y + 24>0


3x + y − 17<0


The solution of the system of inequalities is shown below.

Blue points have integers for coordinates. There are 20 such points.
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