How do you model -) using integer chips?

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Use the distance formula to find the distance between (-3,5) and (3,1)