Factor out the greatest common factor.6m(9 - m) + 7n(9 - m)
A. m(6 + 7n)(9 - m)
B. (6m + 7n)(9 - m)
C. (6m - 7n)(9 - m)
D. 6(m + n)(9 - m)
Answer: B
Mathematics
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A. 15
B. 
C. 10
D. 60
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A. 
B. 
C. 
D. 
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