Find the common difference of the arithmetic sequence 20,18,16,...

What is the slope of a line that is perpendicular to y = 3x + 1

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

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?