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If A = 5i + 2j and B = 3i - 4j, find A · B.

Practice Questions

1 question
Q1
If A = 5i + 2j and B = 3i - 4j, find A · B.
  1. -1
  2. 7
  3. 1
  4. 0

Questions & Step-by-step Solutions

1 item
Q
Q: If A = 5i + 2j and B = 3i - 4j, find A · B.
Solution: A · B = (5)(3) + (2)(-4) = 15 - 8 = 7.
Steps: 0

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