What is the answer to this ?

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?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture