Please help me with this study island question :/

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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?

Which inequality has a dashed boundary line when graphed ?