Understanding Algebraic Expressions
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Questions and Answers

What are constants in algebraic expressions?

  • Numbers that change in value
  • Symbols of addition, subtraction, multiplication, or division
  • Numbers like 5, 39, and 2 (correct)
  • Letters whose values are not known
  • Which of the following is an example of a numerical expression?

  • 8x + 9y
  • 12 x 3 (correct)
  • x + y - z
  • Evaluate the expression two x divided by seven times four
  • What is the order of operations in solving algebraic expressions?

  • MDASPE
  • PEMDAS (correct)
  • MSDEAP
  • EDPAMS
  • Which mnemonic device helps to remember the order of operations in algebraic expressions?

    <p>PEMDAS</p> Signup and view all the answers

    What happens if the order of operations is not followed when solving an algebraic expression?

    <p>Drastically different answers may be obtained</p> Signup and view all the answers

    When evaluating algebraic expressions using PEMDAS, what is the first thing to look for?

    <p>Parenthesis</p> Signup and view all the answers

    In numerical expressions, what is solved first according to the PEMDAS order of operations?

    <p>Exponents</p> Signup and view all the answers

    What should be done first when evaluating variable expressions?

    <p>Substitute values for the variables</p> Signup and view all the answers

    In variable expressions, what is needed in addition to following the PEMDAS order of operations?

    <p>Substituting values for the variables</p> Signup and view all the answers

    What should be done first in Example 2: Evaluate the algebraic expression where b = 11?

    <p>Substitute value for b</p> Signup and view all the answers

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