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OAR Math Skills: Algebraic Expressions Flashcards

7 cards from real OAR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 OAR Math Skills: Algebraic Expressions flashcards as text

  1. Simplify: (2x + 3)(x - 4)

    Answer: 2x² - 5x - 12

    FOIL: 2x² - 8x + 3x - 12 = 2x² - 5x - 12.

  2. What is the value of 3x² - x + 4 when x = -1?

    Answer: 8

    3(1) - (-1) + 4 = 3 + 1 + 4 = 8.

  3. Which expression represents 'six less than twice a number n'?

    Answer: 2n - 6

    'Twice a number' is 2n, and 'six less than' means subtract 6, giving 2n - 6.

  4. Simplify: 5x - 2(3 - x)

    Answer: 7x - 6

    Distribute the -2: 5x - 6 + 2x = 7x - 6.

  5. Factor completely: x² - 9

    Answer: (x+3)(x-3)

    x² - 9 is a difference of squares: (x+3)(x-3).

  6. If 3(x - 2) = 15, what is x?

    Answer: 7

    Divide both sides by 3: x - 2 = 5, so x = 7.

  7. Which expression is NOT equivalent to 12x²y?

    Answer: 4xy · 4xy

    4xy · 4xy = 16x²y², which does not equal 12x²y.