7th grade math help me plz

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

The graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel..