Algebra Ch 1

3. a mathematical statement that two expressions are equal.
7. the level of detail in a measurement and is determined by the smallest unit or fraction of a unit that you can reasonably measure.
9. a letter or symbol used to represent a value that can change
10. a ratio between two sets of measurements
11. a statement that two quantities are not equal.
14. a statements that make two ratios are equivalent
15. an equation that is always true no natter what value is substituted for the variable.
17. a rate with a second quantity of 1 unit
19. figures have exactly the same shape but not necessarily the same size

1. When we substitute a specific value for each variable, and then perform the operations
2. is a comparison of two quantities by division
4. amount by which a measurement is permitted to vary from a specified value
5. the closeness of a measured value to the actual or true value
6. overlapping region
8. a ratio of two quantities with different units
12. a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number
13. terms with same values
16. combined region
18. an equation that states a rule for a relationship among quantities