ANSWER THIS PLS I HAVE 2 MINUTES!!

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

Lauren has five shells she found on the beach seashells represent one-third of the shells her whole collection how many shells does lauren have in her whole collection

If sina is 4/5 then find the value of sin3a . with explanation.