The temperature at noon on a cold winter day was -14.5f. by evening, the temperature had dropped by 3.2, what is the temperature now?

Math each whole number with a rational,exponential expression

Can someone me with these two circle theorem questions asap?

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