The answer is A. i just had that question
24 and 48
24 ÷6 = 4
48 ÷6= 8
4+8=12
you can have 12 cartons.
sorry if I'm wrong, I'm just trying to help.
I believe that would be -4.50 for problems like this you subtract then add the negative sign in front
i'm surprised you are in high school i did this in 6th grade