Please Help NeeD IT NOWWW!!! Calculate the missing variable:

P1 = 30 atm V1 = 2 L P2 = 45 atm V2 = ???

Calculate the missing variable:
P1 = 2 atm V1 = 5 L P2 = ??? V2 = 20 L

My car tire has a volume of 3 L and a pressure of 30 psi. If I increase my tire pressure to 45 psi, what will be the new volume of my tire?

Calculate the missing variable:
T1 = 500 K V1 = 1.5 L T2 = ??? V2 = 10 L

Calculate the missing variable:
T1 = 50 K V1 = 30 L T2 = 225 K V2 = ???

A balloon is inflated at a temperature of 300 K and has a volume of 4.0 L. The balloon is then heated to a final temperature of 450 K. What is the final volume of the balloon?