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Please help!!! thank you

Please help!!! thank you-example-1
User Haehn
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Answer:

The first two are arithmetic sequences

Explanation:

-20 , -25,-30,-35,-40,.....

If we subtract 5 from each term we get the next

This is an arithmetic sequence, with a common difference of -5

-15.6, -12.9, -10.2, -7.5,-4.8.....

If we add 2.7 to each term we get the next

This is an arithmetic sequence, with a common difference of 2.7

3.1, 6.2,12.4,24.8,49.6

We multiply by 2 to get the next term

This is a geometric sequence with a common ratio of 2

7.2,3.6,1.8,.9,.45

We multiply by .5 to get the next term

This is a geometric sequence with a common ratio of .5

User Riyadh Ahmed
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