What is the value of the expression below when

Which ahows the graph of the solution set of 6x+4y< 12

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?