Algebra Crossword puzzle

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Across
  1. 4. a quantity whose value changes
  2. 6. distance around the outside
  3. 8. a polynomial with two terms
  4. 10. a sentence stating that these two expressions are equal
  5. 11. a polynomial with exactly three terms
  6. 12. a denominator can never be
  7. 13. name given to the answer of when numbers are added
  8. 14. the set of numbers are {..-3,-2,-1,0,1,2,3...}
Down
  1. 1. x^2+2x-3 is referred to as a
  2. 2. the ratio of vertical change to horizontal change
  3. 3. the 2 in 3x^2
  4. 5. lines with the same slope are
  5. 7. the longest side in a right triangle.
  6. 9. a relation where each x value has only one y value