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Back to 11.8 Solving Systems with Cramer's Rule

11.8 Exercise 190

Avg difficulty 2.5

Solve using a system of linear equations.

A factory producing cell phones has the following cost and revenue functions: C(x)= x 2 +75x+2,688 C \left(x\right) = x^{2} + 75 x + 2 , 688 and R(x)= x 2 +160x. R \left(x\right) = x^{2} + 160 x . What is the range of cell phones they should produce each day so there is profit? Round to the nearest number that generates profit.

OpenStax Algebra and Trigonometry 2e, 11.8 Solving Systems with Cramer's Rule, exercise 190

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.