Evaluate the expression for b = 9: -b =

Understand the Problem

The question is asking to evaluate the expression -b, where b is given as 9. This involves substituting the value of b into the expression and calculating the result.

Answer

-b = -9

Steps to Solve

Substitute the value of b

We are given that $b = 9$. To evaluate the expression $-b$, we substitute 9 for $b$.

Calculate the expression

Now we calculate $-b$ using the substituted value:

$$ -b = -9 $$

-b = -9

More Information

The expression $-b$ simply indicates the opposite (or negative) value of $b$. When $b$ is 9, the result is -9. This operation is a common way to indicate the additive inverse in mathematics.

Tips

Forgetting to include the negative sign when substituting the value of $b$.
Miscalculating the result by not recognizing that the negative affects the value.

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