EasyQuadratics

OpenStax, Elementary Algebra 2e §10.5 Graphing Quadratic Equations in Two Variables · Exercise 43 · Algebra · Quadratics

Graphing Quadratic Equations in Two Variables · Exercise 43

Solve. Round answers to the nearest tenth.

A computer store owner estimates that by charging $x$ dollars each for a certain computer, he can sell $40 - x$ computers each week. The quadratic equation $R = - x^{2} + 40 x$ is used to find the revenue, $R$ , received when the selling price of a computer is $x$ . Find the selling price that will give him the maximum revenue, and then find the amount of the maximum revenue.

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OpenStax, Elementary Algebra 2e · §10.5 Graphing Quadratic Equations in Two Variables · Exercise 43

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