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Wich expression is not equivalent to the other 3? A) -9-7n+16n B) 9(n-9) C) n-9+8n D) 9n-9
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Wich expression is not equivalent to the other 3? A) -9-7n+16n B) 9(n-9) C) n-9+8n D) 9n-9

User Onelaview
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2 Answers

6 votes
A) -9+9n
B)9n-81
C)9n-9
D)9n-9

B is not equivalent
User Panky Sharma
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3 votes
A) -9-7n+16n=-9+n(16-7)=-9+9n=9n-9
B) 9(n-9)=9×n-9×9=9n-81
C) n-9+8n=n(1+8)-9=9n-9
D) 9n-9

So the answer is B)
User DSent
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