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04-12-2018
Mathematics

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what expression is equal to -5 (-6a + 9) - a

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04-12-2018

[tex]\text{Use distributive property}\ a(b+c)=ab+ac\\\\-5(-6a+9)-a=(-5)(-6a)+(-5)(9)-a\\\\=30a-45-a=(30a-a)-45=\boxed{29a-45}[/tex]

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