Algebra 1-- I do not understand

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If a circle's circumference is 15 inches, what is its radius?

  • Algebra 1-- I do not understand -

    C = pi * d

    15 = 3.14 * d

    15/3.14 = d

    4.77707 = d

    4.77707 / 2 = r

    2.388535 = r

  • Algebra 1-- I do not understand -

    I still don't understand this.

  • Algebra 1-- I do not understand -

    Can you explain the steps in solving this formula?

  • Algebra 1-- I do not understand -

    Please copy and paste the line you don't understand.

  • Algebra 1-- I do not understand -

    C = pi * d

    15 = 3.14 * d

    15/3.14 = d

    4.77707 = d

    4.77707 / 2 = r

    I apologize, but I do not understand any of them.

  • Algebra 1-- I do not understand -

    Circumference = pi * diameter

    Then I substituted real numbers for the letters.

  • Algebra 1-- I do not understand -

    How did you know which numbers to use?

  • Algebra 1-- I do not understand -

    Please memorize pi = 3.154

    Your problem stated that the circumference is 15.

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