40 = 20 12 = ???

i have 40 packs and sold all and got 20$, How many dollars will i get if i sold 12 packs?

What is the difference between regular convex and concave polygons

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.