Algebra :)

3. a symbol for an unknown number
5. A phrase that can contain variables, numbers and operators(add,subtract,multiply,divide)
6. y=mx+b (m=slope;B=y intercept
7. Any of the four areas divided by an x axis and a y axis
8. finding what numbers to multiply to get an expression
10. An expression of the sum or the difference of two terms.
13. An equation that needs one step to be solved
16. An equation that needs two steps to be solved
18. part of a whole
19. Terms that have the same variables, powers or roots.
20. The line on a graph that runs horizantally

1. The rules in which calculations come first in an expression
2. a way to remember how to multiply two binomials
4. The smallest positive number into which two or more numbers divide evenly.
9. A mathematics branch that substitutes letters for numbers
11. a notation that shows the number of times a number is to be multiplied by itself
12. A ratio that compare a number to 100(%)
14. The line on a graph that runs vertically
15. any number used to multiply a variable
17. A comparison between two numbers