Coordinate Algebra Crossword

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Across
  1. 1. two or more inequalities in the same variables that work together
  2. 3. the point at which the line intersects the x- or y-axis
  3. 4. a graphed line or boundary is not part of an inequality's solution
  4. 6. adding or subtracting the equations in the system together so that one of the variables i eliminated; multiplication might be necessary before adding the equations together
  5. 8. a graphed line or boundary is part of an inequality's solution
  6. 9. a system of equations with exactly one solution
  7. 10. the point at which two lines cross or meet
  8. 11. solving a system by graphing equations on the same coordinate plane and finding the point of intersection
  9. 14. a set of equations with the same unknowns
Down
  1. 1. the intersection of the half planes of the inequalities; the solution is the set of all points that make all the inequalities in the system true
  2. 2. solving one pair of equations for one of the variables and substituting that into the other equation
  3. 5. a system of equations with no solutions; lines are parallel when graphed
  4. 7. a region containing all points that has one boundary, a straight line that continues in both directions infinitely
  5. 12. a system of equations that have an infinite number of solutions; lines coincide when graphed
  6. 13. a system of equations with at least one ordered pair that satisfies both equations