The quotient of 12 and opposite of 3 plus the product of the opposite of 14 and 4

Find the measures of the complement and the supplement of each angle, m

What is the approximate circumference of the circle shown below?

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.