# pre algebra

posted by on .

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

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