7x-6y=13 what is this equation in slope intercept form

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?

Can someone me with these two circle theorem questions asap?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?