Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 7 more than 2 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 67?

Van spent 10 minutes on his history homework and 3 minutes per question on his math homework. which graph thows the total homework time, t, related to the number of math questions, q? 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 1 2 3 4 5 6 7 8