Yes.
Yes.
If it is joined by an "and" it does. If it is joined by an "or" it does not.
When there is an ordered pair that satisfies both inequalities.
No. For example, the solution to x ≤ 4 and x ≥ 4 is x = 4.
A system of linear inequalities
Yes.
Yes.
Linear inequalities in one variable
If it is joined by an "and" it does. If it is joined by an "or" it does not.
When there is an ordered pair that satisfies both inequalities.
A linear inequality is all of one side of a plane. A quadratic inequality is either the inside of a parabola or the outside.
yes it is possible for a system of two linear inequalities to have a single point as a solution.
No. For example, the solution to x ≤ 4 and x ≥ 4 is x = 4.
They are not. An inequality cannot, by definition, be the same as an equation.
Linear Inequalities
yes