B. 12x + 27
Explanation: Use the distributive property to multiply 3 by each term inside the parentheses:
3(4x) + 3(9)
= 12x + 27
Therefore, the simplified expression is 12x + 27.
Use the distributive property to simplify the expression 3(4x + 9)
A. 4x + 27
B. 12x + 27
C. 7x + 12
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