To evaluate the expression \( c - d - 2 \) when \( c = -1 \) and \( d = 15 \), we can substitute the values of \( c \) and \( d \) into the expression:
\[ c - d - 2 = -1 - 15 - 2 \]
Now, perform the calculations step by step:
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Calculate \( -1 - 15 \): \[ -1 - 15 = -16 \]
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Now, subtract 2 from \(-16\): \[ -16 - 2 = -18 \]
Therefore, the value of the expression when \( c = -1 \) and \( d = 15 \) is \(-18\).
It seems that \(-18\) is not one of the responses provided. Could there be a mistake in the expression or response options? Otherwise, based on the calculation, the correct answer is \(-18\).
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