Expression equivalent to 6(2+3x)?

Which term best describes the association between variables a and b

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?