Algebra Topic Write Ups

Hi again, You did a couple of topic write ups for me before. Would you consider doing a few more for me and what would you charge to do them? Topics being

1. Solving linear equations containing fractions

2. solving a mixture application (such as 60% of a pure product is added to 10% of another product to produce a 20% product

3. distance rate and time problem

4. multiplying polynomials

5. factoring a difference of squares / sum of squares

6. factoring polynomials

7. factoring trinomials

8. multiplying rational expressions

9. dividing polynomial by a monomial