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Sticky Note
If x = 1 and y = -1, then 13 (x+ y) = _____?
  1. 13
  2. 26
  3. 0
  4. None of these
Explanation

Substitute x = 1 and y = -1 into the expression:

13(x + y) = 13(1 + (-1)) = 13(0).

Therefore, 13(0) = 0.

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