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chubhunter [2.5K]
2 years ago
6

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Mathematics
1 answer:
Len [333]2 years ago
3 0
Answer:

1/2 or 0.5

Step-by-step explanation:

The equation is y=rx
And you know what y and x is.
Substitute the first numbers in;
4.5 = r (9)
Divide by r 9 each side, so r = 4.5/9 = 1/2

Hope this helps!
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Answer:

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Step-by-step explanation:

For the first picture :

The missing angle :

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180 - (122) = 58°

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From ptthagoras:

Tan58° = opposite / Adjacent

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Missing angle :

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Sin21° = opposite / hypotenus

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x = sqrt(22.3^2 - 8^2)

x = sqrt(433.29)

x = 20.8

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3 years ago
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Liono4ka [1.6K]
You can solve for sides of a triangle using the following equation. 

A = arccos (b^2 + c^2 - a^2/2bc)

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