How to convert angle in radians to degrees?

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

Write an equation for the function that includes the points (2,100)and (3,100)

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