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Three times a number (y) is not more than (15). Which inequality is correct?

Answer and explanation

Correct answer: (3y\le 15)

The correct answer is option B: \(3y\le15\). The phrase “three times a number y” means multiply y by 3, giving \(3y\). The phrase “not more than 15” means the quantity may be less than 15 or exactly 15; in symbols, this is \(\le15\). Combining the phrases gives \(3y\le15\). Option A, \(3y<15\), would mean strictly less and would wrongly exclude equality, such as \(3y=15\). Option B is correct because “not more than” includes equality. Option C, \(3y>15\), means more than 15, the opposite meaning. Option D, \(3y\ge15\), means at least 15 and is also opposite to the intended restriction. Memory cue: “not more than” and “at most” mean \(\le\); “not less than” means \(\ge\).

Related tags

Linear-InequalitiesWord-TranslationNot-More-Than

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