The sum of -6 times a number x and 9 is at least 27 what are the possible values of the number​

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

How is this equation completed? i cannot find any examples in the book.

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?