| A | B |
|---|
| parallel lines | inconsistent |
| coinciding lines | consistent and dependent |
| intersecting lines | consistent and independent |
| rref | row-reduced echelon form |
| augmented matrix | matrix with coefficients & constants |
| system of equations | 2 or more equations with the same variables |
| constraint | limit on variables of a function |
| substitution step 1 | solve 1 equation for x or y |
| elimination step 2 | add the equations |
| linear programming | method for finding max or min of a function |
| optimize | max or min value occurs at a vertex |
| solution of a 2x2 system | ordered pair |
| solution of a 3x3 system | ordered triple |
| system of inequalities | 2 or more inequalities with the same variables |
| feasible region | solution of a system of inequalities |
| break-even point | point where income = cost |
| bounded | feasible region is enclosed by constraints |
| unbounded | feasible region is open |
