Freight charges of a certain courier company are as follows: $40 for the first 2 pounds $15 for each of the succeeding pound weight of parcels. At this rate, what amount would be charged on a package which weighs 30 pounds?
6. If 5/6 < x and x < 7/4 then x could be ____.
7. If a square’s each side is increased by x units, then, after that, its perimeter is increased by how many units?