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Multiply the matrix [[5, 1], [0, -5]] by -2.

  • [[5, -2], [0, -5]]
  • [[-10, -2], [0, 10]]
  • [[3, -1], [-2, -7]]
Correct answer(s):
  • [[-10, -2], [0, 10]]

Solve the system: 2x + 3y = 10 and 2x – 1y = -6.

  • x = 4, y = -1
  • x = 10, y = -6
  • x = 1, y = -4
  • x = -1, y = 4
  • x = 0, y = 3
Correct answer(s):
  • x = -1, y = 4

Factorize: x² + 13x + 42.

  • (x – 7)(x – 6)
  • (x + 7)(x – 6)
  • (x + 13)(x + 42)
  • x(x + 13) + 42
  • (x + 7)(x + 6)
Correct answer(s):
  • (x + 7)(x + 6)

Let A = {5, 9, 11, 12, 15, 16} and B = {4, 5, 9, 12, 16}. What is A ∩ B?

  • {11, 15}
  • {}
  • {4, 5, 9, 11, 12, 15, 16}
  • {5, 9, 12, 16}
Correct answer(s):
  • {5, 9, 12, 16}

A fair 5-section spinner and a fair 2-section spinner are spun once. What is the probability of getting one chosen section on each spinner?

  • 1/10
  • 1/7
  • 5/2
  • 2/10
Correct answer(s):
  • 1/10