When there is an ordered pair that satisfies both inequalities.
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A solution to a linear inequality in two variables is an ordered pair (x, y) that makes the inequality a true statement. The solution set is the set of all solutions to the inequality. The solution set to an inequality in two variables is typically a region in the xy-plane, which means that there are infinitely many solutions. Sometimes a solution set must satisfy two inequalities in a system of linear inequalities in two variables. If it does not satisfy both inequalities then it is not a solution.
Yes. As a simple example, consider X ≥ 1 and x ≤ 1. They have the one solution: x = 1
its true because they have all have the same linear pair It's actually false
An independent system has one solution.
The answer for one inequality will NOT anwer the other. For example, you can not be younger and oilder than your brother at the same time.