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If 4x − 1 > 7 and 2x + 3 ≤ 17, what is the common solution set?

Answer and explanation

Correct answer: 2 < x ≤ 7

For a common solution, solve each inequality and take their intersection. From 4x − 1 > 7, add 1 to obtain 4x > 8, then divide by positive 4: x > 2. From 2x + 3 ≤ 17, subtract 3 to get 2x ≤ 14, then divide by positive 2: x ≤ 7. A number must satisfy both conditions, so it must be greater than 2 and at most 7. Therefore the intersection is 2 < x ≤ 7, which is option C. The lower endpoint 2 is excluded because the first inequality is strict, while 7 is included because the second inequality is non-strict. Option B incorrectly includes 2, option D incorrectly excludes 7, and option A describes a disjoint condition rather than the common intersection.

Related tags

Linear InequalitiesIntersectionCompound ConditionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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