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kogti [31]
2 years ago
15

PLEASE HELP LAW OF COSINES

Mathematics
2 answers:
RoseWind [281]2 years ago
8 0

Answer:

34 degrees

Step-by-step explanation:

edg quiz

chubhunter [2.5K]2 years ago
7 0
The Law of Cosine states
cosC=(a^2+b^2-c^2)/2ab

so plugging in the numbers gives us

cosJ=(13^2+19^2-11^2)/2(13*19) = 409/494

We now have cosJ so plug that into your calculator and find arccos (arccos(cos(J)) = J)
arccos(409/494)=34.11
rounding your answer will give you 34°
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Answer:

(-38) / (-8)

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Step-by-step explanation:

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Inessa [10]

Answer:

\large\boxed{(2b+3)\times(5b-1)\times(5b+1)}

Step-by-step explanation:

The formula of a volume of a rectangular box:

V=lwh

<em>l</em><em> - lenght</em>

<em>w</em><em> - width</em>

<em>h</em><em> - height</em>

V=50b^3+75b^2-2b-3=25b^2(2b+3)-1(2b+3)\\\\=(2b+3)(25b^2-1)=(2b+3)(5^2b^2-1^2)\\\\=(2b+3)\bigg((5b)^2-1^2\bigg)\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=(2b+3)(5b-1)(5b+1)

Therefore the dinemsions of thisp prism are:

(2b+3)\times(5b-1)\times(5b+1)

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