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8th Grade Math Flashcards

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

Read the first 6 8th Grade Math flashcards as text

  1. A rectangle has a length of 3x + 2 and a width of x - 1. Which expression represents its perimeter?

    Answer: 8x + 2

    Perimeter = 2(length + width) = 2((3x+2)+(x-1)) = 2(4x+1) = 8x+2.

  2. Which of the following is the slope-intercept form of a line passing through (0, 4) with slope -2?

    Answer: y = -2x + 4

    Slope-intercept form is y = mx + b. With slope m = -2 and y-intercept b = 4, the equation is y = -2x + 4.

  3. A bag contains 5 red, 3 blue, and 2 green marbles. What is the probability of drawing a blue marble?

    Answer: 3/10

    Total marbles = 5 + 3 + 2 = 10. P(blue) = 3/10.

  4. What is the value of x in the equation 2(x + 3) = 14?

    Answer: x = 4

    2(x+3) = 14 → x+3 = 7 → x = 4.

  5. Which of the following represents a function?

    Answer: {(1,2),(2,3),(3,4)}

    A function requires each input (x-value) to map to exactly one output. {(1,2),(2,3),(3,4)} has unique x-values, so it is a function.

  6. A triangle has angles measuring 55 degrees, 70 degrees, and x degrees. What is the value of x?

    Answer: 55

    The sum of angles in a triangle = 180 degrees. 55 + 70 + x = 180, so x = 55.