Which expression represents 878787 less than the product of 121212 and 151515?

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

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.