Nala can spend no more than $150 per month on gasoline. She has already purchased $60 in gas this month. Which inequality can be used to find the maximum number of fill-ups she can purchase during the rest of the month, assuming each fill-up costs $30?

Let n represent the number of additional fill-ups. Those fill-ups cost $30n, and adding the $60 already spent gives a total of 30n + 60 dollars. Since Nala can spend no more than $150, the total must be less than or equal to $150; among the choices, B, 30n + 60 < 150, has the correct expression and direction.

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