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77julia77 [94]
3 years ago
10

Find measure dbc 19 22 23 161 HELP !!!

Mathematics
1 answer:
iren2701 [21]3 years ago
4 0
Angles ABD and DBC are supplementary.  They are also a linear pair because they share a ray.  Supplementary angles add up to equal 180, as do linear pairs. Therefore, from our picture, 7x + x - 4 = 180.  8x = 184.  Therefore, x = 157.  157-4 = ∠DBC, so ∠DBC = 153.
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Which sentence is NOT a geometric progression?
DIA [1.3K]

<u>c) 3, 6, 9 12</u>  is NOT a geometric progression

<h3>Further explanation </h3>

Geometry sequences are series of numbers that have a constant ratio

or can be interpreted:

Each number is obtained by multiplying the previous number by a constant

The sequence can be:

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\large {\boxed {\bold x_n = ar ^ {n-1}}}

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a. \dfrac{5}{1}=\dfrac{25}{5}=5\to \rm geometric\:progression

b. \dfrac{8}{4}=\dfrac{16}{8}=2\to \rm geometric\:progression

c.\dfrac{6}{3}\neq \dfrac{9}{6}\to \rm not\:geometric\:progression

d. \dfrac{6}{2}=\dfrac{18}{6}=3\to \rm geometric\:progression

<h3>Learn more </h3>

a geometric sequence

brainly.com/question/1480821

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the formula for a finite geometric series

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Keywords : a geometric sequence, the first term, the common ratio

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Answer:

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