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Math Flashcards

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

Read the first 7 Math flashcards as text

  1. If 3x - 7 = 2x + 5, what is the value of x?

    Answer: 12

    Subtract 2x from both sides to get x - 7 = 5, then add 7 to get x = 12.

  2. What is the slope of the line passing through the points (2, 3) and (6, 11)?

    Answer: 2

    Slope = (11 - 3)/(6 - 2) = 8/4 = 2.

  3. A right triangle has legs of length 5 and 12. What is the length of the hypotenuse?

    Answer: 13

    By the Pythagorean theorem, sqrt(5^2 + 12^2) = sqrt(169) = 13.

  4. What is 20% of 250?

    Answer: 50

    20% of 250 = 0.20 × 250 = 50.

  5. If f(x) = 2x^2 - 3x + 1, what is f(2)?

    Answer: 3

    f(2) = 2(4) - 3(2) + 1 = 8 - 6 + 1 = 3.

  6. What is the value of |−8| + |3|?

    Answer: 11

    |−8| = 8 and |3| = 3, so the sum is 11.

  7. The average of three numbers is 15. If two of the numbers are 10 and 20, what is the third?

    Answer: 15

    The sum must be 45; 45 - 10 - 20 = 15.