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Let's evaluate the expression \( y^2 + 4y + 3 \) when \( y = 7 \).

### Solution
1. Substitute \( y = 7 \) into the expression:
   \[
   y^2 + 4y + 3 = 7^2 + 4 \cdot 7 + 3
   \]

2. Calculate \( 7^2 \):
   \[
   7^2 = 49
   \]

3. Calculate \( 4 \cdot 7 \):
   \[
   4 \cdot 7 = 28
   \]

4. Substitute these values back into the expression:
   \[
   49 + 28 + 3 = 80
   \]

The correct answer is **80**, not 95.

Let me know if you want more details or have any questions!

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Here are 5 related questions to expand your understanding:
1. What would the expression \( y^2 + 4y + 3 \) equal if \( y = -7 \)?
2. How do we evaluate expressions when multiple variables are present?
3. What are the steps to simplify an expression before substitution?
4. How can we verify answers by substituting values back into equations?
5. How does changing the value of \( y \) impact the expression \( y^2 + 4y + 3 \)?

**Tip:** When substituting values, carefully perform each arithmetic operation step-by-step to avoid errors.

What is the value of the expression y^2 + 4y + 3 when y = 7?

Learn how to evaluate the expression y^2 + 4y + 3 when y = 7. This algebraic problem involves substitution and calculation, suitable for students in Grades 7-9.

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