Marco and his friend Victor are pitchers for their school baseball team. On average, Marco strikes out 2.4 batters per game. On average, Victor strikes out 4.6 batters per game. What is the difference in their strikeout averages?

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?