Do you know your algebra terms?

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Across
  1. 2. The answer to an addition problem
  2. 5. Element in a sum, difference, or sequence
  3. 6. A value greater than zero
  4. 8. A fractional quantity written with a decimal point
  5. 12. The set of inputs (x-coordinates of a relation or function
  6. 15. In mathematics, a rectangular arrangement of rows and colums
  7. 16. A straight like, or an equation or expression whore graph is a straight line
  8. 17. A value less than zero
  9. 19. Going from side to side,like the horizon
  10. 20. A collection of related measurements
Down
  1. 1. Rewriting an expression as a product
  2. 3. A standard measurement,such as a meter or an hour
  3. 4. An image formed by plotting the solutions to an equation of inequality, or some other set of pairs of numbers
  4. 7. In a power, the number of times the base is multiplied by itself
  5. 9. A single fixed number
  6. 10. A constant that a variable or expression is multiplied by
  7. 11. An expression that is used to compute a value
  8. 13. A number that measures how steep a line is
  9. 14. A number that is raised to a power
  10. 17. The top number or expression in a fraction
  11. 18. A number that variable or expression can equal