i wish that i could help you but I just dont understand it... I am sorry
You take the amount paid and divide it by the amount of cheese. So 10.50 divided by 2.5 equals 4.2 and 12.60 divided by 3 equals 4.2 meaning that one pound of cheese costs $4.20
It would be 30 degrees since a line is 180. You subtract 150 from 180 and get 30.
There are 6 balls to every box (a ratio of 6 to 1). Therefore, when there are 78 balls, there are 13 boxes.