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2 years ago

Plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help asap i dont get this

Mathematics

2 answers:

Stels [109]2 years ago

5 0

Answer:

x=19

Step-by-step explanation:

(7x+7) + (2x+2) = 180

9x + 9 = 180

9x=171

x=19

Alekssandra [29.7K]2 years ago

3 0

Answer:

X=19

Step-by-step explanation:

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Rashid [163]

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Step-by-step explanation:

According to the cosine rule

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Putting values

$\Rightarrow \cos (180^{\circ}-\theta)=\dfrac{83^2+111^2-165^2}{2\times 83\times 111}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{6889+12321-27225}{18426}\\\\\Rightarrow \cos(180^{\circ}-\theta)=\dfrac{-8015}{18426}=-0.4349\\\\\Rightarrow 180^{\circ}-\theta=\cos^{-1}(-0.4349)=115.77^{\circ}\\\Rightarrow \theta=64.23\approx 64.2^{\circ}$

So, the ship turns by $64.2^{\circ}$ north of west

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