Question

Evaluate the expression for r = 9.

|r| + 3 =
question


key idea


solution

Answer 1

To evaluate the expression \( |r| + 3 \) for \( r = 9 \), we can follow these steps:

### Question
Evaluate \( |r| + 3 \) for \( r = 9 \).

### Key Idea
The absolute value of a number, denoted as \( |r| \), provides the non-negative value of that number, regardless of its sign. Since \( r = 9 \) is already positive, \( |r| = r \).

### Solution
1. Substitute \( r = 9 \) into the expression:
\[
|9| + 3
\]

2. Calculate \( |9| \):
\[
|9| = 9
\]

3. Substitute this back into the expression:
\[
9 + 3
\]

4. Calculate the result:
\[
9 + 3 = 12
\]

Thus, the evaluated expression for \( r = 9 \) is:
\[
\boxed{12}
\]