Tony loves to put stickers on his papers. tony has 15 shark stickers. tony has 21 whale sticker. tony has 47 dolphi stickers. tony has 40 papers. tony puts a dolphine sticker on every paper. tony puts a shark sticker on every fourth paper. tony puts a whale sticker on every fifth paper. when tony finishes putting all the stickers on the papers, how many papers will all three kinds of stickers on them.

2 papers

Step-by-step explanation:

shark stickers : 15

whale stickers : 21

dolphin stickers : 47

papers:40

papers with dolphin stickers: 47

papers with shark stickers: 4, 8 , 12, 16, 20,24,28,32,36, 40 (every fourth paper, multiples of 4 till 40)

40/4 = 10  papers with shark stickers

papers with whale stickers: 5, 10,15, 15, 20, 25,30,35,40 (multiples of 5 till 40)

Papers with the three kinds of stickers : 2 (paper 20 and 40 )

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8