Compound Inequalies - Wrong Answer?
Beantwortet


The first answer is correct because only one of the two inequalities needs to be true. The answer to the first inequality is x <= 31/3. The answer to the second inequality is x <= 5. (And if any of you following along got the answer x >= 5, remember that you need to change the direction of the inequality when multiplying by a negative number.) If the connector had been AND instead of OR, then the second answer would have been correct because x needs to be less than both 31/3 and 5 and thus less than the smaller number. But since the connector is OR, the first answer is correct since x only needs to be less than the larger number.
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