9. Jen’s lawn mowing service charges $28 an hour plus a $15 fee to cover gas for the mower. Malcolm's lawn service charges $16 an hour, but a $63 fee. For
how many hours will Jen's service be cheaper than Malcolm's?

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

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.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.