Three siblings- kate, sarah, and dave- committed themselves to volunteer 160 hours for a homeless charity to build new housing . dave worked 15 hours more than kate. sarah worked 5 hours fewer than kate. how many hours did each of this siblings volunteer?

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