The car used 77 gallons of gas in 2 3/4 hours. what is this unit rate in miles per gallon

When can u say there is no solution for a system of linear inequalities? explain your answer and show with a system and graph

Empty box + box + empty box fill in the box is equal to 30 how

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?