Is 8x greater than or equal to -40

I think you are asking if -8x ≥ 40, find x. What we do here is we divide negative 8 by both sides. This gives us x ≥ 5. BUT, we have to be careful When we divide an inequality on both sides by a negative number, we have to switch the sign. Thus, our answer is x ≤ 5. 

It would be 3x+3 because the skate rental is for the day and she spent 3 hours skating. hope this !