Multiple Choice Question (MCQ)

In terms of x , what is the average (arithmetic mean ) of 4x-2 , x+2 , 2x+3 , and x+1 ?

  1. ×

    2x-1

  2. ×

    2x

  3. 2x+1

  4. ×

    2x+4

  5. ×

    8x+4

Collected in the board: Calculate algebraic expressions

Steven Zheng posted 3 months ago


Answer

  1. The arithmetic mean is defined as \dfrac{a_1+a_2+\dots+a_n}{n}, in which a_n could be algebraic expression.

    Here the average (arithmetic mean ) of 4x−2 , x+2 , 2x+3 , and x+1 is

    \dfrac{4x-2+x+2+2x+3+x+1}{4}

    = 2x+1

    C is correct choice

Steven Zheng posted 2 weeks ago

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