You and a friend are planting flowers. You spent $180 on 10 tulips and 12 marigolds. Your friend spent $74 on 9 tulips and 2 marigolds. What is the cost of one tulip and one marigold?

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?