Use the indicated property to provide a new expression equal to the given expression. Simplify, if possible.(4x + 3y) + 9z; associative
A. (4x + 3y + 9z)
B. 4x + 3y + 9z
C. 4x + (3y + 9z)
D. (3y + 4x) + 9z
Answer: C
Mathematics
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A. 
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