I attached your answer below...
Demarco wants to find the angle measures of this parallelogram. He knows that the first step is to find the value of x. Which of
these equations will result in the correct value of x?
A. x + 15 = 6x + 4
B. 7x − 19 + 2x − 8 = 180
C. 7x − 19 = x + 15
D. 6x + 4 + 7x − 19 = 180
A. x + 15 = 6x + 4
B. 7x − 19 + 2x − 8 = 180
C. 7x − 19 = x + 15
D. 6x + 4 + 7x − 19 = 180
1 answer:
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Given:
The geometric sequence is:
1 -4
2 20
3 -100
To find:
The explicit formula and list any restrictions to the domain.
Solution:
The explicit formula of a geometric sequence is:
...(i)
Where, a is the first term, r is the common ratio and .
In the given sequence the first term is -4 and the second term is 20, so the common ratio is:
Putting in (i), we get
where
Therefore, the correct option is B.