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lianna [129]
3 years ago
10

I keep struggling on this question can someone help me figure it out

Mathematics
1 answer:
cestrela7 [59]3 years ago
3 0

Answer:

the last one

Step-by-step explanation:

(:

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Please Help Brainliest to whoever can give a clear explanation for this problem!
iren [92.7K]

See the attached sketch. Let \beta denote angle ABC and \beta' denote angle CBD. Then \beta'=2\beta.

From the sketch, we see that

\tan\beta=\dfrac15

\tan(\beta+\beta')=\tan(3\beta)=\dfrac{AD}5

Write \tan(3\beta) in terms of \tan\beta. Recall the angle sum identity for tangent:

\tan(x+y)=\dfrac{\tan x+\tan y}{1-\tan x\tan y}

This gives us

\tan(3\beta)=\dfrac{\tan\beta+\frac{2\tan\beta}{1-\tan^2\beta}}{1-\tan\beta\cdot\frac{2\tan\beta}{1-\tan^2\beta}}=\dfrac{\tan\beta(\tan^2\beta-3)}{3\tan^2\beta-1}

and plugging in \tan\beta=\frac15 leaves us with

\tan(3\beta)=\dfrac{37}{55}

and so AD = 5 * 37/55 = 37/11.

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3 years ago
The population of town A increases from 1,346 to 1500. In the same period, the population of town b increases from 1,546 to 1,80
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Loading...finding....matching...sorry bro no idea. actually, i believe it is a = 37% and b = b
8 0
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Hey can anyone please help me with these t questions asap?
rosijanka [135]

Answer:

21) 27

22) 2 (the third one has a few people in it)

Step-by-step explanation:

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BlackZzzverrR [31]

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Yup! Great Job!

Step-by-step explanation:

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If you round the number, it could become approximately 27.8 or even 28 .</span>
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4 years ago
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