Need help with this ASAP ill love u forever :)

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.