Practice Test GeeksMath Practice Test
← All Math Flashcard Decks

Math Algebra and Functions Flashcards

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

Read the first 6 Math Algebra and Functions flashcards as text

  1. What is the value of x in the proportion 4/x = 8/20?

    Answer: 10

    Cross-multiply: 4 × 20 = 8 × x → 80 = 8x → x = 10.

  2. Simplify the expression: (2x³)(3x²)

    Answer: 6x⁵

    Multiply coefficients and add exponents: 2 × 3 = 6 and x³ × x² = x⁵, giving 6x⁵.

  3. If y varies directly with x and y = 15 when x = 3, what is y when x = 7?

    Answer: 35

    k = y/x = 15/3 = 5; so y = 5 × 7 = 35.

  4. What is the domain of f(x) = √(x − 4)?

    Answer: x ≥ 4

    The expression under the square root must be ≥ 0: x − 4 ≥ 0, so x ≥ 4.

  5. Which of the following represents an exponential function?

    Answer: y = 3 × 2ˣ

    y = 3 × 2ˣ is exponential because the variable x is in the exponent.

  6. Solve for x: |2x − 4| = 10

    Answer: x = 7 or x = −3

    2x − 4 = 10 gives x = 7; 2x − 4 = −10 gives x = −3.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. We have not yet matched this exam's facts to an official source, so confirm fees, dates and rules with the exam body. Not reviewed by a subject-matter expert. Editorial policy