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Write the inequality (2x-5\le 7) in interval form.

Answer and explanation

Correct answer: ((-\infty,6])

The direct answer is option B: \((-\infty,6]\). Solve first: \(2x-5\le7\). Add 5 to both sides to get \(2x\le12\). Divide by positive 2, giving \(x\le6\). In interval notation, all numbers extending left without bound are represented by \(-\infty\), and 6 is included because equality is allowed, so a square bracket is used at 6: \((-\infty,6]\). Option A uses a parenthesis and wrongly excludes 6. Option B is correct. Option C describes values from 6 upward, the opposite direction. Option D excludes 6 and goes rightward. Infinity always uses a parenthesis because it is not an actual endpoint.

Related tags

Linear InequalitiesInterval NotationSolution Set

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