What is the domain of this function?

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?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Find │7│. a. 1 over 7 b. –7 c. 7 asap i always mark brailiest who me so