Use the cost equation to find the number of units x that a manufacturer can produce for cost C. (Round your answer to the nearest positive integer.) C = 0.5x2 + 12x + 5000,   C = $12,500

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Equations and inequalities describe the relationship between two mathematical expressions.

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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.