Which sequences are geometric? Select three options. -2.7, -9, -30, -100, ...
1, 2.5, -6.25, 15.625, ...
9.1, 9.2, 9.3, 9.4, ...
8, 0.8, 0.08, 0.008, ...
4,-4, -12, -20, ...

1: -2.7, -9, -30, -100

2: -1, 2.5, -6.25, 15.625

3:4, -4, -12, -20

Step-by-step explanation:

A, B, AND D ARE THE ANSWERS ON EDGE-NUITY!

Step-by-step explanation:

HERE I'LL SHOW YOU:

Which sequences are geometric? Select three options.

✔️–2.7, –9, –30, –100, ...

✔️–1, 2.5, –6.25, 15.625, ...

9.1, 9.2, 9.3, 9.4, ...

✔️8, 0.8, 0.08, 0.008, ...

4, –4, –12, –20, ...

*pasted from e2020/edge-nuity*

I hope this helps! I GAVE PROOF!

A, B, D

Step-by-step explanation:

A geometric sequence has terms that are multiplied or divided by the same factor each time, as opposed to an arithmetic, which is addition or subtraction.

So if we divide the terms by each other, we can tell.

-9/-2.7 = -30/-9 = -100/-3, so A is geometric.

2.5/-1 = -6.25/2.5 = 15.625/-6.25, so B is geometric.

9.2/9.1 ≠ 9.3/9.2 ! C is an arithmetic sequence.

.8/8 = .08/.8 = .008/.08, so D is geometric.

-4/4 ≠ -12/-4 ! E is an arithmetic sequence.