you play 3 games in 2.5 hours, so:
[tex]\frac{3}{2.5}=1.2[/tex]1.2 games is the average rate of games per hour.
To find the average cost per game, we are going to divide the total cost by the 3 games you play:
[tex]\frac{42}{3}=14[/tex]$14 is the average cost per game.
To find the average cost per person, we are going to divide the total cost by the 4 of you:
[tex]\frac{42}{4}=10.5[/tex]$10.5 is the average cost per person
To find the average cost per minute, we are going to divide the total cost by 150 minutes because is the equal to 2.5 hours:
[tex]\frac{42}{150}=0.28[/tex]$0.28 is the average cost per minute