Jane has a gift card with a balance of $100 she buys several t-shirts that cost $15 each after the purchases her gift card balance is $10 write an equation to find out how many t-shirts jane bought.

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