Select one variable to represent one quantity and express the second quantity in terms of the first. a 9-foot piece of wood is cut into 2 pieces. Let $$ x $$ represent the length of the first piece of wood. Express the length of the rest of the wood in terms of $$ x $$.

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Let $$ x $$ represent the length of the first piece of wood in feet. Since the original piece of wood is 9 feet long and it's cut into two pieces, the length of the second piece can be expressed as follows:

$$
\text{Length of the second piece} = 9 - x \text{ feet}
$$

**Explanation:**

- **Total length of the wood:** 9 feet
- **Length of the first piece:** $$ x $$ feet
- **Length of the second piece:** Subtract the length of the first piece from the total length.

So, the second piece is $$ 9 - x $$ feet long.
Let $$ x $$ be the length of the first piece. The length of the second piece is $$ 9 - x $$ feet.

Select one variable to represent one quantity and express the second quantity in terms of the first. a 9-foot piece of wood is cut into 2 pieces. Let \( x \) represent the length of the first piece of wood. Express the length of the rest of the wood in terms of \( x \).

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