Can someone help me? someone said to use SIN

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?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?