Why does a right regtangler prism conect to a square

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.