Systems of inequalities. Numerical intervals
Answers are for parents and teachers.
1
Solve {3x - 1 > 5, x + 4 < 9}.
2 < x < 5
2
Solve {2x + 3 ≥ 1, 5 - x > 0} and write the answer as an interval.
[-1; 5)
3
Does the system {x - 2 > 3, x < 4} have a solution?
No (x > 5 and x < 4)
4
How many integer solutions has -3 ≤ x ≤ 1?
5
5
Which inequality corresponds to (-∞; 2]?
x ≤ 2