An online bookstore sells novels and magazines. Each novel sells for $5, and each magazine sells for $1. If Michelle purchased a total of 15 novels and magazines that have a combined selling price of $43, how many novels did she purchase? She purchased .
(have to solve this using system of equations)

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Which expression can be used to find the cost of .75 kilogram of cheese at the price of $6.40 per kilogram?

Need answer asap (see image) (20 points)