I need help pls
and explain aslo

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

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Consider the first four terms of the sequence below. what is the 8th term of this sequence?