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What is the area of the region formed by \(x\ge 0\), \(y\ge 0\), \(x\le 4\), and \(y\le 3\)?

Answer and explanation

Correct answer: 12

The constraints give \(0\le x\le 4\) and \(0\le y\le 3\). Therefore, the region is a rectangle with length 4 units parallel to the \(x\)-axis and width 3 units parallel to the \(y\)-axis. Its area is \(4\times 3=12\) square units. A value such as 10 may result from identifying the shape incorrectly. Exam tip: first write the minimum and maximum bounds of \(x\) and \(y\) to identify the region.

Related tags

Linear InequalitiesGraphical SolutionAreaRectangular RegionTwo VariablesClass 11Graphical Solution Of Linear Inequalities In Two VariablesMathematics

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