To simplify the expression $-9(8x + 11)$, apply the distributive property by multiplying $-9$ with each term inside the parentheses.

$-9(8x + 11) = (-9 \times 8x) + (-9 \times 11)$

Now, calculate:

$-9 \times 8x = -72x$ $-9 \times 11 = -99$

So, the simplified expression is:

$-72x - 99$

Would you like further details or explanations? Here are 5 related questions for further practice:

1. Simplify $-7(3x + 5)$.
2. Solve $3x - 5 = -7$.
3. Expand and simplify $2(4x - 6) + 3(2x + 1)$.
4. Factor $-72x - 99$.
5. Solve $-72x - 99 = 0$ for $x$.

Tip: Always apply the distributive property carefully, remembering to multiply both terms inside the parentheses.