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marin [14]
3 years ago
13

Help pls!!!

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0

Answer:

an = -6n + 5.

Step-by-step explanation:

This is an arithmetic sequence with first term a1 = -1 and common difference d = -6

an = a1 + d(n-1)

an = -1 + -6(n - 1)

an = -1 -6n + 6

an = -6n + 5.

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Step-by-step explanation:

From the figure attached,

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Therefore, by the property of similar triangles, corresponding sides of these similar triangles will be proportional.

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\frac{AB+BC}{BC}= \frac{ED+DC}{DC}

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AB + 6 = 24

AB = 18

Option (B) will be the answer.

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