1. Which of the following is a system of linear inequalities in two variables?
A. {
+ 2 > 5
− 7 < 4
C. {
+ ≤ 5
− = 4
B. {
≥ − 9
< 2 − 3
D. {
−12 > +
10 ≤ − 1
2. Which of the following is NOT a system of linear inequalities in two variables?
A. {
+ ≥ 6
− ≤ 4
C. {
+ 3 ≤ −5
2 − 3 < 4
B. {
15 − <
+ 2 > −
D. {
−14 < + 5
12 ≥ 5 −
3. Which of the following is a graph of a system linear inequalities in two variables?
A. C.
B. D.
4. Which is a solution of the system of linear inequality in two variables {
+ ≥ 6
− ≤ 2
?
A. (3, 4) C. (9, -4)
B. B. (-2, 5) D. (4, 2)
