PLEASE HELP AND NO LINKS OR YOU WILL BE REPORTED. I need help with this, I chose the answer B but I’m afraid it’s wrong please help me

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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 of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?