PLEASE HELP MEEEEE Two numbers, 4 and a, have a geometric mean of 12.Find the value of a. Two numbers, 3 and

Question

PLEASE HELP MEEEEE

Two numbers, 4 and a, have a geometric mean of 12.Find the value of a.

Two numbers, 3 and a, have a geometric mean of 9.Find the value of a.

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Raelynn 1 month 2021-09-11T21:15:19+00:00 1 Answer 0

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    2021-09-11T21:16:44+00:00

    Answer:

    a = 36 and a = 27

    Step-by-step explanation:

    The geometric mean of two numbers is the square root of the product of the two numbers.

    Say for example we have the numbers x and y, the geometric mean z is mathematically;

    z = √xy

    For the first question, our z is 12, x and y are 4 and a respectively.

    12 = √4a

    square both sides

    144 = 4a

    a = 144/4

    a = 36

    For the second question

    z is 9, x and y are 3 and a respectively

    9 = √3a

    square both sides

    81 = 3a

    a = 81/3

    a = 27

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45:7+7-4:2-5:5*4+35:2 =? ( )