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If the boundary line of \(ax+y\leq 4\) has (x)-intercept ((2,0)), what is the value of (a)?

Answer and explanation

Correct answer: 2

The boundary line of the inequality is \(ax+y=4\). At the x-intercept, \(y=0\). Substituting the given point \((2,0)\) gives \(2a+0=4\), so \(2a=4\) and \(a=2\). If \(a=1\), the x-intercept would be \((4,0)\), not \((2,0)\). Exam tip: to find an x-intercept, always put \(y=0\).

Related tags

Linear InequalitiesBoundary LineX-InterceptCoordinate GeometryParameterGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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