B In Problems 21–28, find the indicated function if cost and revenue are given by C(x) = 145 + 1.1x and R(x) = 5x – 0.02x², respectively. 21. Average cost function 22. Average revenue function 23. Marginal average cost function 24. Marginal average revenue function

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

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.