Considering that there is a total number of orders of 10, the amount of bags ordered for the holiday should be 5, given by the ratio of wrapping paper to bags, 5:5.
AB = 24
BC = 45
AC = 51
cos C = adjacent / hypotenuse
cos C = BC / AC
cos C = 45/51
They gave the coordinates so you are going to use distance formula to find the MN.
Here is the inequality you can enumerate:
5x >= 200, this means the money you sold for cakes must be larger or equal to your goal
x <= 100, this means you cannot sell more than 100 cakes, because you only have 100 cakes
Solve for them, you will get: 40 <= x <= 100