(4,1) and (-4,1) are they undifined

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 shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

On a piece of paper graft y+2> -3x-3 then determine which answer matches the graph you drew