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2 years ago

Hi does anybody know the answer to this?

Mathematics

2 answers:

dybincka [34]2 years ago

7 0

Answer:

(L)= 36 ft. 3/10

Step-by-step explanation:

Correct me if I'm wrong. Have a good day! :)

AURORKA [14]2 years ago

3 0

Answer:

28 ft

Step-by-step explanation:

50+50+33+33=166 <-- Perimeter of Mss Roberts

Mr Neils width is 1.1 * 50 = 55

166 = 55 + 55 +2l

56=2l

28 = l

the length is 28 ft.

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KonstantinChe [14]

Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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zepelin [54]

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Step-by-step explanation:

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2 years ago

Plźzzz help me ... I'll give brainliest

fgiga [73]

Answer:

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Step-by-step explanation:

Consider the double angle identity for tangents:

$\displaystyle \tan(2\theta) = \frac{2\tan{\theta}}{1 - \tan^{2}{\theta}}$ .

Also, for two complementary angles,

$\displaystyle \tan{\left(\frac{\pi}{2} - \theta \right)} = \frac{1}{\tan{\theta}}$ .

Subtract $\tan^{-1}(x + 1)$ from both sides of this equation:

$\displaystyle 2\tan^{-1}{x} = \frac{\pi}{2} + (-\tan^{-1}(x + 1))$ .

Take the tangent of both sides of this equation:

$\displaystyle \tan(2\tan^{-1}{x}) = \tan\left(\frac{\pi}{2} -\tan^{-1}\left(x + 1\right)\right)$ .

Apply the double-angle identity to the left-hand side of this equation:

$\displaystyle \tan(2\tan^{-1}{x}) \implies \frac{2\tan(\tan^{-1}x)}{1 - \tan^{2}(\tan^{-1}x)}\implies \frac{2x}{1 - x^{2}}$ .

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$\displaystyle \tan\left(\frac{\pi}{2} -\tan^{-1}\left(x + 1\right)\right)\implies \frac{1}{\tan(\tan^{-1}(x + 1))} \implies \frac{1}{x + 1}$ .

Equate the two sides of this equation:

$\begin{aligned} & \frac{2x}{1 - x^{2}} = \frac{1}{x + 1}\\ \implies & \frac{2x}{(1 - x)(1 + x)} = \frac{1}{1 + x}\\\implies & 2x = 1 - x,\; x \ne 1,\; x \ne -1\\\implies & x = \frac{1}{3}\end{aligned}$ .

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3 years ago

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Butoxors [25]

9514 1404 393

Answer:

x = 100

Step-by-step explanation:

The two marked angles are a linear pair, so their sum is 180°.

57° +(x +23)° = 180°

x = 100 . . . . . . . . . . . . . divide by °, subtract 80

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3 years ago