Question

three classmates are working with three different expressions each classmate substitutes in the value x = 4 into their expression

elle: 5x - 10
parker: 5x^2 + 3
nellie: 5^x - 40

Answer 1

Let's evaluate each classmate's expression by substituting \( x = 4 \).

**Elle's expression:**
\[
5x - 10
\]
Substituting \( x = 4 \):
\[
5(4) - 10 = 20 - 10 = 10
\]

**Parker's expression:**
\[
5x^2 + 3
\]
Substituting \( x = 4 \):
\[
5(4^2) + 3 = 5(16) + 3 = 80 + 3 = 83
\]

**Nellie's expression:**
\[
5^x - 40
\]
Substituting \( x = 4 \):
\[
5^4 - 40 = 625 - 40 = 585
\]

### Summary of Results:
- Elle's result: 10
- Parker's result: 83
- Nellie's result: 585