These tiles represent the expression 3(

To simplify the expression \( 3(-4x - 9) \), we can distribute the 3 to both terms inside the parentheses:

\[ 3(-4x) + 3(-9) \]

Calculating each term:

1. \( 3 \times -4x = -12x \)
2. \( 3 \times -9 = -27 \)

Now combine these results:

\[ -12x - 27 \]

Thus, the expression equivalent to \( 3(-4x - 9) \) is:

\[ -12x - 27 \]