algebra crossword puzzle

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Across
  1. 8. A mathematical sentence showing two expressions are equal
  2. 11. A combination of numbers, variables, and operations
  3. 13. A statement comparing two expressions using <, >, ≤, or ≥
  4. 14. An expression with more than one term
  5. 15. A number multiplied by a variable
Down
  1. 1. A rule that matches inputs to outputs
  2. 2. the steepness of a line
  3. 3. A letter or symbol that represents an unknown number
  4. 4. The point where a graph crosses an axis
  5. 5. Tells how many times a base is multiplied by itself
  6. 6. A number that divides another number evenly
  7. 7. A graph that forms a straight line
  8. 9. A second-degree polynomial
  9. 10. A whole number and its opposite
  10. 12. comparison of two quantities using division