What are the roots of the equation 2x2 + 9x + 6 = 0?

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

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.

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?