Which sequences are geometric? check all that apply. 10, 7.5, 5.625, 4.21875, … 160, 40, 10, 2.5, … 20, 70, 245, 857.5, … 13, 16.5, 20, 23.5, … 5, 5.5, 6.05, 6.655, … 16, 17.1, 18.2, 19.3, …

Geometric sequences have same common ratio between two numbers.

Either the same number is multiplied or divided between two numbers.

1) 10, 7.5, 5.625, 4.21875... The common ratio is 0.75

This is a geometric sequence.

2) 160, 40, 10, 2.5... The common ratio is 0.25

This is a geometric sequence.

3) 20, 70, 245, 857.5,... The common ration is 3.5

This is a geometric sequence.

4) 13, 16.5, 20, 23.5... This is not a geometric sequence. It is arithmetic sequence.

This is not a geometric sequence.

5) 5, 5.5, 6.05, 6.655, ... The common ratio is 1.1

This is a geometric sequence.

6) 16, 17.1, 18.2, 19.3, ...

This is not a geometric sequence.

555.99.

step-by-step explanation:

hope this

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.