Algebra :)

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Across
  1. 3. a symbol for an unknown number
  2. 5. A phrase that can contain variables, numbers and operators(add,subtract,multiply,divide)
  3. 6. y=mx+b (m=slope;B=y intercept
  4. 7. Any of the four areas divided by an x axis and a y axis
  5. 8. finding what numbers to multiply to get an expression
  6. 10. An expression of the sum or the difference of two terms.
  7. 13. An equation that needs one step to be solved
  8. 16. An equation that needs two steps to be solved
  9. 18. part of a whole
  10. 19. Terms that have the same variables, powers or roots.
  11. 20. The line on a graph that runs horizantally
Down
  1. 1. The rules in which calculations come first in an expression
  2. 2. a way to remember how to multiply two binomials
  3. 4. The smallest positive number into which two or more numbers divide evenly.
  4. 9. A mathematics branch that substitutes letters for numbers
  5. 11. a notation that shows the number of times a number is to be multiplied by itself
  6. 12. A ratio that compare a number to 100(%)
  7. 14. The line on a graph that runs vertically
  8. 15. any number used to multiply a variable
  9. 17. A comparison between two numbers