Algebra Unit 1 Vocabulary

5. A mathematical sentence that contains an equal sign
6. A value that does not change (number)
8. vertical axis on a coordinate plane...top to bottom
11. A real number subset on positive numbers: {1, 2, 3, ....}. Also called "counting numbers."
14. a quantity that is multiplied
15. The intersection of the sets of A and B, written A∩B, is the set of elements that are in both A and B., only the members that overlap
19. Any equation that can be put in the form ax^2+bx+c=0:U shaped line on a graph
20. A number multiplied by a variable in an algebraic expression.
22. A mathematical phrase that contains operations, numbers, and/or variables.
23. Limits on the variables in the function
24. horizontal axis on a coordinate plane...left to right
25. A system of ordered marks at fixed intervals used as a reference standard in measurement
26. a set of two or more inequaltites with the same variables. the solution is where the shading overlaps
31. A letter used to represent one or more numbers
32. A real number that can be written as a ratio of two integers(fraction). Rational numbers in decimal form are terminating or repeating.

1. the set of numbers that includes rational and irrational numbers
2. A real number subset for numbers that cannot be written as fractions. Examples include non-repeating decimals and square roots of non-perfect squares.
3. A real number subset of natural numbers (counting numbers) and zero; {0, 1, 2, 3...}
4. a set with no elements shown by the symbol { } or a circle with a line going through it
7. A set of equations with the same variables. The solution of the system is the ordered pair that is a solution for all of the equations.
9. Any set whose elements can be counted.
10. In a right triangle, the hypotenuse is the longest side, which is opposite the right angle.
12. the parts of an expression between the + and - signs
13. A plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis.
16. the point (0,0) where the x-axis and the y-axis intersect in a coordinate plane
17. The union of sets A and B, written A U B, is the set of all elements in either A or B (or in both)
18. An equation whose graph is a straight line
21. Having the same value
27. bar break, no key, intervals are too large, labels are inaccurate
28. The distance a number is from zero on a number line. ALWAYS POSITIVE
29. A set with an unlimited number of elements that cannot be counted.
30. A real number subset of positive and negative whole numbers: {... -3, -2, -1, 0, 1, 2, 3...}(Does not include fractions or decimals)