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

Question

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