If you have 31 questions on a test and you get 5 wrong what is your grade

Plz which expression is equivalent to the expression below?

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.