2. Convert 4 cups to gallons.

Really need on these. i have no idea what to do

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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?