Let's evaluate each classmate's expression by substituting \( x = 3 \).
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Whitney's expression: \( 4x - 8 \) \[ 4(3) - 8 = 12 - 8 = 4 \]
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Theo's expression: \( 4x^2 - 8 \) \[ 4(3^2) - 8 = 4(9) - 8 = 36 - 8 = 28 \]
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Erin's expression: \( 4x - 8 \) (which is the same as Whitney's) \[ 4(3) - 8 = 12 - 8 = 4 \]
Now, summarizing their results:
- Whitney: 4
- Theo: 28
- Erin: 4
Among the results, Theo produced the largest value, which is 28.