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liubo4ka [24]
3 years ago
9

Law of cosines: a2 = b2 + c2 -2bccos(A) What is the value of s to the nearest whole number?

Mathematics
2 answers:
xxTIMURxx [149]3 years ago
8 0

Answer:

14

Step-by-step explanation:

The law of cosines is a² = b²+c²-2bc(cos A).

We will use s in place of a, since it is the unknown side.  This makes b and c 8 and 9.

Angle A will be the angle opposite side a, or in this case side s.  This makes it 111.

This gives us

s² = 8²+9²-2(8)(9)(cos 111)

s² = 64+81-2(8)(9)(cos 111)

s² = 145-144(cos 111)

s² = 196.605

Take the square root of each side:

√(s²) = √(196.605)

s = 14.02 ≈ 14

tatiyna3 years ago
6 0

Answer:

14

Step-by-step explanation:

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Answer:

2x² + 3x + 4 + (17x + 9) / (x² − 4)

Step-by-step explanation:

Start by setting up the division.  Make sure to write all the coefficients, even the zero ones.

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Start by dividing the first term of the dividend (2x⁴) by the first term of the divisor (x²).  That's 2x²; it'll be the first term in quotient.  Multiply the divisor by 2x²:

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3 years ago
6. In right triangle ABC, mZC=3y-10,
lorasvet [3.4K]

Answer:

scalene

Step-by-step explanation:

step 1

Find the value of y

we know that

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In this problem

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substitute the given values

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substitute the value of y

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step 3

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3 years ago
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Answer:

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Step-by-step explanation:

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