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Which inequality has the solution set \((-4,\infty)\) over the real numbers?

Answer and explanation

Correct answer: \(2x+8>0\)

Solving \(2x+8>0\) gives \(2x>-8\), and hence \(x>-4\). Therefore, its solution set is \((-4,\infty)\); \(-4\) is excluded because the inequality is strict. Option B gives \(x<-4\), while options C and D give \(x>4\) and \(x<4\), respectively. Exam tip: an open endpoint means that the boundary value is not included in the solution set.

Related tags

Solution SetInterval NotationLinear InequalityAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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