You'd do $500 x 0.15 to which gives you 75$ in tax. $500 + $75 = $575 selling price
So what you do is go 5(3y+5)-4y=14 which equals 15y+25-4y=14 which turns into 11y+25=14 than you move the 25 over which equals 11y=-11 so y=-1 then you enter -1 in for y which looks like 5x-4(-1)=14 than you solve that which is 5x+4=14 than you move the 4 over and you get 5x=10 than x=2
x=2
y=-1
G(1) = 2(1) + 4 = 6
g(1) = 6
70mi/1hr x 1hr/60min x 1min/60sec= .0194/1sec