To find \( f(x) \) when \( x = 30 \), we can substitute \( x = 30 \) into the given function:

\[
f(x) = 2x + 1
\]

Substituting \( x = 30 \):

\[
f(30) = 2(30) + 1 = 60 + 1 = 61
\]

So, \( f(30) = 61 \).

Would you like more details or have any questions?

Here are 5 related questions for you to explore:
1. What would \( f(x) \) be if \( x = -5 \)?
2. How would the function change if it were \( f(x) = 3x + 1 \)?
3. Can you find the inverse of the function \( f(x) = 2x + 1 \)?
4. What is the slope of the function \( f(x) = 2x + 1 \)?
5. How would you graph \( f(x) = 2x + 1 \)?

**Tip:** When evaluating a function, always substitute the variable with the given value and follow the order of operations.

Learn how to evaluate the linear function f(x) = 2x + 1 when x = 30. This example involves basic algebraic concepts of substitution and function evaluation, suitable for students in Grades 6-8.

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