Jeff assumes that the opposite of what he is trying to prove is true. Jeff had just completed the first step in which geometric process?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

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 value of cos330° is √3/2 then find tan165°.