Solve Using a System of Three Linear Equations

question 80

Multiple Choice

Solve using a system of three linear equations.
-A real estate investor is examining a triangular plot of land. She measures each angle of the field. The sum of the first and second angles is 114° more than the measure of the third angle. If the measure of the third angle is
Subtracted from the measure of the second angle, the result is twice the measure of the first angle. Find the
Measure of each angle. (Note: The sum of the angles of a triangle is 180°.)

• A)First angle is 42°, second angle is 111°, third angle is 27°
• B)First angle is 38°, second angle is 109°, third angle is 33°
• C)First angle is 36°, second angle is 109°, third angle is 31°
• D)First angle is 44°, second angle is 105°, third angle is 31°

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Definitions:

Four-Firm Concentration

A measure of market concentration that evaluates the total market share of the four largest firms within an industry.

Standard Oil Case

A 1911 antitrust case in which Standard Oil was found guilty of violating the Sherman Act by illegally monopolizing the petroleum industry. As a remedy the company was divided into several competing firms.

Microsoft Case

A 2002 antitrust case in which Microsoft was found guilty of violating the Sherman Act by engaging in a series of unlawful activities designed to maintain its monopoly in operating systems for personal computers; as a remedy the company was prohibited from engaging in a set of specific anticompetitive business practices.

U.S. Steel Case

The antitrust action brought by the federal government against the U.S. Steel Corporation in which the courts ruled (in 1920) that only unreasonable restraints of trade were illegal and that size and the possession of monopoly power were not by themselves violations of the antitrust laws.