Find the mean absolute deviation (MAD) of the data in the bar chart below.

1. are the triangles similar and if so why? what is the value of x? show your work.

What two criteria are needed for triangles to be similar

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