Let's simplify the expression \(6(9x + 13) + 4x\) step by step.
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Distribute the \(6\) in the first term: \[ 6(9x) + 6(13) = 54x + 78 \]
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Now, add the \(4x\) to it: \[ 54x + 78 + 4x = (54x + 4x) + 78 = 58x + 78 \]
So, the simplified expression is: \[ 58x + 78 \]
Now let's compare it with the options given:
A. \(58x + 78\)
B. \(136x\)
C. \(58x - 78\)
The correct answer is: A. 58x + 78