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Algebra & Functions Flashcards

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

Read the first 7 Algebra & Functions flashcards as text

  1. A function is defined by g(x) = 5x + 2. For what value of x does g(x) = 27?

    Answer: 5

    Set 5x + 2 = 27, so 5x = 25 and x = 5.

  2. What is the y-intercept of the line 4x - 2y = 8?

    Answer: -4

    Set x = 0: -2y = 8, so y = -4.

  3. If a^2 = 49 and a < 0, what is a?

    Answer: -7

    The square roots of 49 are 7 and -7, and the negative one is -7.

  4. Solve the system: x + y = 10 and x - y = 4. What is x?

    Answer: 7

    Adding the equations gives 2x = 14, so x = 7.

  5. What is the value of the expression 3x^2 - 2x when x = 3?

    Answer: 21

    3(9) - 2(3) = 27 - 6 = 21.

  6. If the vertex of a parabola y = x^2 - 6x + 5 is at x = h, what is h?

    Answer: 3

    The vertex x-coordinate is -b/(2a) = 6/2 = 3.

  7. Simplify (6x^2 + 4x) / 2x, assuming x is not zero.

    Answer: 3x + 2

    Dividing each term by 2x gives 3x + 2.