The expression 15n + 2(3p) represents the amount Isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. Which statement is true about the amount Isaiah spent?

The term 15n represents the cost of gasoline: n is the price per gallon, so 15 is the number of gallons bought. The term 2(3p) represents snacks, which simplifies to 6p dollars because he bought 2 snacks at 3p dollars each. Therefore, the true statement is that he bought 15 gallons of gasoline.

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