Algebra 2 polynomials problem. i can't figure it out, already found the zeros but can't find the multiplicity

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Rai compares two cable plans from different companies. which equation gives the correct value of mm, the number of months for which plans a and b cost the same?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?