Answer:
297 cards in a year
Step-by-step explanation:
There are 12 months in a year, and he gets 2 packs of cards every month.
12*2 = 24 packs of cards a year
He gets 3 extra packs of cards for his birthday.
24 + 3 = 27 packs of cards
There are 11 cards in each pack.
27 X 11 = 297 cards in a year
Switch .91 and .19 and you're good
15
(18+22+17+x)/4=18
18+22+17+x=18×4
57+x=72
x=72-57
x=15