algebra crossword puzzle

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Across
  1. 4. result by dividing one quantity with another
  2. 7. when multiplied by itself makes a special quantity
  3. 9. adding two or more numbers together
  4. 10. splitting numbers into equal groups
  5. 12. a letter in the alphabet to represent an unknown number
  6. 14. when the variable or number is less than the given limit
  7. 18. when the variable or number is less than or equal to the given limit
  8. 19. two lines beside each other that never cross or touch and go on infinitely
  9. 20. the measure obtained by dividing the y component of the line with the x component of the line
Down
  1. 1. when the variable or number is greater than or equal to the given limit
  2. 2. vertical plane on a graph
  3. 3. the difference of two or more numbers
  4. 5. when a line touches or crosses the x axis
  5. 6. when you multiply a number and a variable
  6. 8. the repetition of adding numbers
  7. 11. horizontal plane on a graph
  8. 13. when the variable or number is greater than the given limit
  9. 15. two lines that cross and make a 90 degree angle
  10. 16. value the actual distance of the integer from zero, in a number line
  11. 17. how steep a line is