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Algebra / Linear inequalities in one or two variables Difficulty: Easy

Which of the following ordered pairs x comma y satisfies the inequality 5 x minus 3 y is less than 4 ?

  1. Statement 1, 1 comma 1
  2. Statement 2, 2 comma 5
  3. Statement 3, 3 comma 2​​​​​​​

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Explanation

Choice C is correct. Substituting the ordered pair 1 comma 1 into the inequality gives 5 times 1, minus, 3 times 1, is less than 4, or 2 is less than 4, which is a true statement. Substituting the ordered pair 2 comma 5 into the inequality gives 5 times 2, minus, 3 times 5, is less than 4, or negative 5 is less than 4, which is a true statement. Substituting the ordered pair 3 comma 2 into the inequality gives 5 times 3, minus, 3 times 2, is less than 4, or 9 is less than 4, which is not a true statement. Therefore, the ordered pair 1 comma 1 and the ordered pair 2 comma 5 are the only ordered pairs shown that satisfy the given inequality.

Choice A is incorrect because the ordered pair 2 comma 5 also satisfies the inequality. Choice B is incorrect because the ordered pair 1 comma 1 also satisfies the inequality. Choice D is incorrect because the ordered pair 3 comma 2 does not satisfy the inequality.