To use the distributive property on the expression \(-6(a + 7)\), we will distribute \(-6\) to both \(a\) and \(7\).
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Apply the distributive property: \[ -6(a + 7) = -6 \cdot a + (-6) \cdot 7 \]
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Simplify each term: \[ -6a - 42 \]
So, the rewritten and simplified expression is: \[ -6a - 42 \]