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If x -1/x = 4 then the value of x3+1/x3

Name the most appropriate metric unit for each measurement like the mass of cow

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

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?