Simplify. 2m2 – 4n2 3m – 6m2 – 2m 7n2
a. −4m2 3n2 m
b. −4m2 3n2
c. –36m 28n
d. 9m2 6m 11n2

Anyone know? is appreciated! will mark brainliest if correct!

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.

What is not true about kl and mn? what is mn? (show your work)