F(x)=x^2-2x-1  and   g(x)=5x-1/7x-3 find f(x+7) and g(x/2)

F(x + 7)
(x + 7)² - 2(x + 7) - 1
x² + 14x + 49 - 2x - 14 - 1
x² + 12x + 49 - 15
x² + 12x + 34
f(x + 7) = x² + 12x + 34

g(x/2)
5(x/2)² - 1/7(x/2) - 3
5(x²/4) - x/14 - 3
5x²/4 - x/14 - 3
g(x/2) = 5x²/4 - x/14 - 3

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.