What is values of he given digits in the 4s in 4400

Will give brainliest what is the value of x? enter your answer in the box.

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.

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume