1. Which of the following is a linear inequality in two variables?
A. 6c - 2a < 4
B. 7ab + 4c > 10 - d
C. 2b ≤ 2 + b
D. 10 + 2e ≥ 3f - 1​

2. Which of the following mathematical expressions is written in standard form?
A.x < y + 2
B.6x +2y<8
C.y + 5 > 2x
D. 2x+5 ≤ x-3y - 7

3. The mathematical statements below are all linear inequalities in two variables EXCEPT:
A. 2y > 4 - 2x.
B.2x + y<9
C. 4x + 5x ≥ 20
D. 23 ≤ 3a + 2b

4. Which of the following verbal phrases DOES NOT represent a linear inequality in two variables?
A. "the number of COVID patient in the center is 10"
B. "the number of COVID patient center is at most 10"
C. "the number of COVID patient center is greater than 10"
D. "the number COVID patient center is less than or equal to 10"​