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disa [49]
3 years ago
8

What is the length of BC?please help!!!

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0

Answer:

2.1

Step-by-step explanation:

using cosine theorem or substraction of two vector

b = AC = 5

c = AB = 6

a² = b² + c² - 2bc cos A

a² = 5² + 6² - 2*5*6 cos 20°

a² = 4.62

a = √4.62

a = 2.149

a ≈ 2.1

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ikadub [295]

Step-by-step explanation:

multiply 5x+2y=19 by 3 youll get 15x+6y=57

eliminate y

7x-6y=9

<u>15x+6y=57</u><u> </u> +

22x=66

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substitute x to 5x+2y=19

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4 0
3 years ago
Please help I will mark Brainly
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When given Three points on a coordinate plane, you may be able to find a specific Quadratic equation that intersects all given p
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Answer:

  TRUE

Step-by-step explanation:

A quadratic equation can be found that will go through any three distinct points that ...

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How do i estimate quotients 933 divided by 3
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K, so
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