Solve for x.
-2(-x – 3) – 4x – 1= 13
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Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

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.

How can you tell when x and y are not directly proportional?