Determine the domain and range of the relation {(3, 8), (3, 2), (5, 2), (6, 1), (9,1)} I don't understand domain and range. Help please.

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Which system of linear inequalities is represented by the graph?