Algebra crossword

4. a letter representing something unknown
5. the vertical axis on the Cartesian coordinate plane
9. a mathematical rule or relationship that uses letters to represent amounts which can be changed
10. a value or number that never changes
11. variable a variable whose value depends upon independent variables
12. a combination of numbers, variables, functions.
13. expression an expression obtained by a finite number of the fundamental operations of algebra upon symbols representing numbers.
14. a single mathematical expression
15. a statement of the equality of two mathematical expressions.

1. a space measured in degrees between two intersecting lines
2. the horizontal plane of a graph in a Cartesian coordinate system
3. a number signifying the result of a calculation or function
6. two numbers or sometimes a letter and a number, that locate a specific point on a grid, known as a coordinate plane
7. a number multiplied by a variable.
8. variable other variables in an expression or function and whose value determines one or more of the values of the other variables.