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Yes.
Yes.
If it is joined by an "and" it does. If it is joined by an "or" it does not.
There is only one solution set. Depending on the inequalities, the set can be empty, have a finite number of solutions, or have an infinite number of solutions. In all cases, there is only one solution set.
They can have none, one or infinitely many.
Yes.
Yes.
If it is joined by an "and" it does. If it is joined by an "or" it does not.
There is only one solution set. Depending on the inequalities, the set can be empty, have a finite number of solutions, or have an infinite number of solutions. In all cases, there is only one solution set.
Systems of equations can have just about any number of solutions: zero, one, two, etc., or even infinitely many solutions.
They can have none, one or infinitely many.
There are more solutions in a half plane
It is important to know several techniques for solving equations and inequalities because one may work better than another in a particular situation.
If they are quadratic equations then if their discriminant is less than zero then they have no solutions
Solving linear systems means to solve linear equations and inequalities. Then to graph it and describing it by statical statements.
No. For example, the solution to x ≤ 4 and x ≥ 4 is x = 4.
One solution