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Mathematics

1 answer:

Bogdan [553]2 years ago

5 0

I believe the answers are the following:

5. x = ±3.4641i

6. x = ±7

hope this helped! please mark brainliest if you get the chance :)

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Find the center and radius for the circle by the equations: x2 + y2 + 5x - y + 2 = 0.

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X2+5x+y2-y=-2
X2+2*5x2+(5/2)^2-(5/2)^2+y2-2*y/2+(1/2)^2-(1/2)^2=-2
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Answer:

Step-by-step explanation:

a. This is a right triangle with two sides and one angle given.

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$\frac{a}{Sin \ A}=\frac{b}{Sin \ B}=\frac{b}{Sin \ C}$

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Hence the angle B is 36.03°

b.We again use the sine rule to obtain the unknown angle w:

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$\frac{a}{Sin \ a}=\frac{b}{Sin \ B}\\\\\frac{15}{Sin \ 90\textdegree}=\frac{9}{Sin \ w\textdegree}\\\\\\\\w=Sin^{-1}(\frac{9}{15}), \ \ Sin \ 90\textdegree=1\\\\=36.87\textdegree$