The expression \( 6 - x \) represents a situation where a total amount (6) is decreased by some unknown quantity (\( x \)). Based on this interpretation, the following situations from your list apply:
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Gabrielle decreased her 6-minute mile by an unknown amount of time. - This indicates that Gabrielle's mile time is diminished from 6 minutes by some unknown time, which aligns with the expression.
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Naomi gives some of her six pencils away. - Here, the total number of pencils (6) is decreased by the number of pencils she gave away, which can be represented by \( 6 - x \).
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Six servings of dinner were decreased by a number. - This implies that the original six servings were reduced by some unknown quantity, fitting the \( 6 - x \) expression.
The other options:
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Benjamin lost six of his stickers. - This suggests a total loss of 6, not a subtraction from 6.
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Sydney increased her collection of coins by six. - This indicates an increase to a number, rather than a decrease from 6.
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Westville has 6 fewer schools than Eastville. - This situation describes a comparison that doesn't fit the \( 6 - x \) format directly in the context given.
Thus, the three situations that represent the expression \( 6 - x \) are the first, second, and fourth options.
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