math crossword

3. a rate, number, or amount in each hundred.
5. the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
6. the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
8. use or add in a place of.
9. a coordinate system that specifies each point uniquely by a pair of numerical coordinates.
12. the degree of steepness of a graph at any point.

1. an arithmetical value, expressed by a word or symbol, representing a particular quantity.
2. (with reference to a number) resolve or be resolvable into factors.
4. the rules for simplifying expressions involving powers of the same base number
7. become or make larger or more extensive.
10. making something in its simplest form.
11. the amount of a charge or payment expressed as a percentage of another amount, or as a basis of calculation.