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Mathematics

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Quizzes in Mathematics

Let A = {1, 2, 9, 13, 17} and B = {9, 10, 13, 15, 17}. What is A ∩ B?

  • {1, 2}
  • {1, 2, 9, 10, 13, 15, 17}
  • {9, 13, 17}
  • {}
Correct answer(s):
  • {9, 13, 17}

Add the matrices [[7, 5], [1, -3]] and [[5, 3], [5, 7]].

  • [[2, 2], [-4, -10]]
  • [[12, 8], [6, 4]]
  • [[12, 6], [8, 4]]
  • [[35, 15], [5, -21]]
Correct answer(s):
  • [[12, 8], [6, 4]]

Solve the system: 1x + 2y = 11 and 2x – 1y = -3.

  • x = 1, y = 5
  • x = 11, y = -3
  • x = -1, y = -5
  • x = 5, y = 1
  • x = 2, y = 4
Correct answer(s):
  • x = 1, y = 5