Let's evaluate each classmate's expression by substituting \( x = 3 \).
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Whitney's expression: \[ 4x - 8 \] Substituting \( x = 3 \): \[ 4(3) - 8 = 12 - 8 = 4 \]
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Theo's expression: \[ 4x^2 - 8 \] Substituting \( x = 3 \): \[ 4(3^2) - 8 = 4(9) - 8 = 36 - 8 = 28 \]
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Erin's expression: \[ 4^x - 8 \] Substituting \( x = 3 \): \[ 4^3 - 8 = 64 - 8 = 56 \]
Now, let's summarize the results:
- Whitney: \( 4 \)
- Theo: \( 28 \)
- Erin: \( 56 \)
From these results, Erin produced the largest value, which is 56.