translating English phrases into algebraic expressions
1. the difference of a number and three
2. the quotient of a number and nine
3. seven more than a number
4. the product of a number and four
5. twice a number subtracted from 17
6. six times a number increased by 15
7. thrice X plus twice y
8. ten less than a number
9. five times the sum of a number and 3
10. four times a number divided by 2