pre algebra

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find the common ratio in the sequence 8, 12, 18, 27,..... then write the next three terms of the sequence

  • pre algebra -

    1/2 of 8 = 4
    8 + 4 = 12

    1/2 of 12 = 6
    12 + 6 = 18

    1/2 of 18 = 9
    18 + 9 = 27

    1/2 of 27 = 13.5
    27 + 13.5 = 40.5

    What do you think the next two numbers are?

  • pre algebra -

    jeez i don't get it

  • pre algebra -

    I showed you how this sequence was figured.

    What part of what I posted don't you understand?

  • pre algebra -

    1/2 of ...and how do u kno what number to put?

  • pre algebra -

    I took the first numbers in the sequence -- 8, 12, 18, and 27.

    For the next number,
    Take 1/2 of 40.5
    Add that number to 40.5 to get the next number in the sequence.

  • pre algebra -

    i got 10.125

  • pre algebra -

    Wrong. Doesn't half of 40 equal 20???

    1/2 = 0.5

    Use a calculator and multiply:
    0.5 * 40.5

  • pre algebra -

    20.25?

  • pre algebra -

    Right. Half of 40.5 = 20.25

    Add:
    40.5 + 20.25 = ?

    That will give you the sixth number of the sequence.

  • pre algebra -

    thx but need ur help anymore,... im such a pain..i'll do them on my own

  • pre algebra -

    thx but DON'T need ur help anymore,... im such a pain..i'll do them on my own

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