If y varies inversely as x and y is 6 when x is 12, what is x when y is 14.4?

For inverse variation, the product x·y stays constant. Using x = 12 and y = 6 gives 12·6 = 72, so when y = 14.4, x = 72 ÷ 14.4 = 5. The correct choice is 5.

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