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11 March, 09:40

Write the equation of a circle givin by (x-3) ^2 + (y+7) ^2=4

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Answers (1)
  1. 11 March, 12:05
    0
    Answer:8

    Step-by-step explanation: (

    x

    +

    4

    )

    2

    +

    (

    y

    -

    7

    )

    2

    =

    64

    This is the form of a circle. Use this form to determine the center and radius of the circle.

    (

    x

    -

    h

    )

    2

    +

    (

    y

    -

    k

    )

    2

    =

    r

    2

    Match the values in this circle to those of the standard form. The variable

    r

    represents the radius of the circle,

    h

    represents the x-offset from the origin, and

    k

    represents the y-offset from origin.

    r

    =

    8

    h

    =

    -

    4

    k

    =

    7

    The center of the circle is found at

    (

    h

    ,

    k

    )

    .

    Center:

    (

    -

    4

    ,

    7

    )

    These values represent the important values for graphing and analyzing a circle.

    Center:

    (

    -

    4

    ,

    7

    )

    Radius:

    8
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