A car salesman is paid a commission of $420 when he sold a used 2016 Acura RDX for $21000 during a certain month. What percentage of the sale did he receive as commission?

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

Solve: 3x+y=6 4x-2y=18 show all work !