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.

~5 minWritten answer · compare with the solution

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

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.