F(x) is what they gain, and g(x) is what they lose. Therefore, it would be (f-g)(3) or first choice
5/100=0.05
0.05*45.90=2.295
$2.30 is the tax. Feel free to correct this If wrong.
Are you sure that one of the variables is v and not y?
v+4= -2(x-1)
Since you posted v, I will use v in place of y.
v + 4 = -2x + 2
v = -2x + 2 - 4
v = -2x - 2
Done!
