Posted by **lavena** on Sunday, June 20, 2010 at 8:58pm.

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

- pre algebra -
**Ms. Sue**, Sunday, June 20, 2010 at 9:06pm
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 -
**lavena**, Sunday, June 20, 2010 at 9:15pm
jeez i don't get it

- pre algebra -
**Ms. Sue**, Sunday, June 20, 2010 at 9:17pm
I showed you how this sequence was figured.

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

- pre algebra -
**lavena**, Sunday, June 20, 2010 at 9:34pm
1/2 of ...and how do u kno what number to put?

- pre algebra -
**Ms. Sue**, Sunday, June 20, 2010 at 9:39pm
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 -
**lavena**, Sunday, June 20, 2010 at 9:48pm
i got 10.125

- pre algebra -
**Ms. Sue**, Sunday, June 20, 2010 at 9:56pm
Wrong. Doesn't half of 40 equal 20???

1/2 = 0.5

Use a calculator and multiply:

0.5 * 40.5

- pre algebra -
**lavena**, Sunday, June 20, 2010 at 10:03pm
20.25?

- pre algebra -
**Ms. Sue**, Sunday, June 20, 2010 at 10:11pm
Right. Half of 40.5 = 20.25

Add:

40.5 + 20.25 = ?

That will give you the sixth number of the sequence.

- pre algebra -
**lavena**, Sunday, June 20, 2010 at 10:19pm
thx but need ur help anymore,... im such a pain..i'll do them on my own

- pre algebra -
**lavena**, Sunday, June 20, 2010 at 10:25pm
thx but DON'T need ur help anymore,... im such a pain..i'll do them on my own

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