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inna [77]
3 years ago
6

Law of cosines: a2 = b2 + c2 – 2bccos(A) What is the value of n to the nearest whole number? 18 22 29 41

Mathematics
2 answers:
nalin [4]3 years ago
4 0
We know that
applying the law of cosines
a² = b²+ c²<span> – 2*b*c*cos(A)
</span>
in this problem
a=?
b=20
c=9
A=90°
so
a² = b²+ c² – 2*b*c*cos(A)
but
cos (A)=0
a² = b²+ c²-----> 20²+9²----> a²=400+81----> a²=481-----> a=√481
a=21.93-----> a=22

the answer is
22

vampirchik [111]3 years ago
3 0

B. 22

Law of cosines: a2 = b2 + c2 – 2bccos(A)

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Answer:

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3 years ago
Find the coordinates of the other endpoint when given midpoint (point M) and one of the endpoints (point P). P=(3,5) and M=(-2,0
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Answer:

About Points

S = (x,y)        searched point (it will be in the third quadrant )

M = (-2,0)      Midpoint | SP |

P = (3,5)        one end of the segment | SP |

You have to draw Cartesian.

we set in a point M and P. We both points by a simple and we extend it for the third quarter of the system. Compass measure the distance from the point M to the point P. From the point M we set a compass point S. Figure attached. Received point S = ( -7 , -5 ) . It sought a point that calculate .

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Step-by-step explanation:

8 0
2 years ago
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MARK AS BRAINLEST
Ierofanga [76]

Answer:

Option C 3n^{2}+n-2

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<u><em>Verify each expression</em></u>

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so

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3n^{2}+n-2

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6 0
3 years ago
Please help me with these questions.
Debora [2.8K]
4. k less than 3.5, so a number k is being taken away from 3.5:
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6. 5 less than y, plus g, so do a combination of the strategies used in the previous two problems and you will get: (y-5)+g

7. 5 less than the sum of y and g, you are taking away 5 from the sum of two numbers, y and g, so: (y+g)-5

Hope this helps :-)
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3 years ago
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MA_775_DIABLO [31]

Answer:

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