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What is the solution set of (\frac{4x+9}{5}\le \frac{x-6}{2})?

Answer and explanation

Correct answer: \(x\le -16\)

Multiplying both sides by the positive number 10 does not change the inequality sign: \(2(4x+9)\le 5(x-6)\). Thus, \(8x+18\le 5x-30\), so \(3x\le -48\), giving \(x\le -16\). The close distractor \(x<-16\) is incorrect because at \(x=-16\), both sides are equal, so the endpoint must be included. Exam tip: an inequality sign does not reverse when multiplying or dividing by a positive number.

Related tags

Linear InequalitiesOne VariableFractional InequalitiesAlgebraic SolutionClass 11 MathematicsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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