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Anvisha [2.4K]
3 years ago
14

Plz help me with this

Mathematics
1 answer:
Shalnov [3]3 years ago
7 0

Answer:

The answer is B. (-3, 0)

Step-by-step explanation:

2x + (x + 3) = -6

3x + 3 = -6

3x = -9

x = -3

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Find the side and measure B
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When angle opposite to the unknown sides and other two sides are given then we use law of cosines

Law of cosine

c^2 = a^2 + b^2 - 2ab cos(c)

From the given diagram

AB^2 = CB^2 + AC^2 - 2(CB)(AC) cos( c)

CB = 108

AC= 55

Angle c= 59

AB^2 = 108^2 + 55^2 - 2(108)(55) cos( 59 )

AB^2 = 8570.34767

Take square root on both sides

AB = 92.6 m

To find out angle B we use sine law

\frac{sin(a)}{a} =   \frac{sin b}{b}  = \frac{sin c}{c}

\frac{sin b}{b}  = \frac{sin c}{c}

From the figure

\frac{sin B}{AC}  = \frac{sin C}{AB}

\frac{sin B}{55}  = \frac{sin 59}{92.6}

sin(B) = 0.50916647

B = sin^{-1}(0.50916647)

Angle B= 30.61 degrees

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