Science Bowl Question

📅 NSB 2011 Set 4🎓 HS🔄 Round 8#️⃣ Question 12❓ Toss-Up📝 Multiple Choice

If x = 4 and y = 2, which of the following expressions is undefined?

W) 3x + 7/(4 - 2y)
X) 2y + 4x
Y) xy - x^2
Z) x + (7 - 4)/2
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