Answer:
54t - 18c + 81
Explanation:
We need to distribute the 9 to each term in the parentheses.
9 × (6t - 2v + 9)
Can be rewritten as...
9 × 6t - 9 × 2c + 9 × 9
See how the 9 is multiplied by every term in the parentheses. This is distribution.
54t - 18c + 81 ⇒ equivalent expression (after computing the multiplication)