Iam stuck on this problem. find the equation of the parabola given that the vertex is (-2,-20) and the y-intercept is (0,-12). the part where i input the answer is written as _x^2 + _x + _. however, for the last term i keep getting -12 but the last term is positive in the answer choice. i've used both equations of y-k = a(x-h)^2 and also the equation y=ax^2+bx+c.

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.