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which of the following pairs of function are inverses of each other?

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Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

What is the equation of a line passing through (-6,5) and having a slope of 1/3