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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:

y = 3 + the square root of 2.

Step-by-step explanation:

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Alik [6]
A triangle interior angles add up to 180

so we have 3:4:5
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6 0
3 years ago
Given h (t) = negative 2 (t + 5) squared + 4, find h (negative 8)
kaheart [24]

Answer:

h(-8)= -14

Step-by-step explanation:

h(-8)= -2(-8 + 5)^2  + 4

h(-8)= -2(-3)^2  + 4

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4 0
3 years ago
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Nonamiya [84]
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5 0
3 years ago
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Chris requires three fifths liter of paint to complete a poster. He has one half liter of paint. Which equation can be used to f
Makovka662 [10]

Answer:

d the expression with the fractions three fifths minus one half is equal to the expression with the fractions six tenths minus five tenths is equal to the fraction one tenth

Step-by-step explanation:

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