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06-06-2018
Mathematics

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PLEASE ANSWER + BRAINLIEST!!!

What is the length of side q, given r = 20, s = 30, and Q = 15°? Round the answer to the nearest tenth.

[Not drawn to scale]

A. 11.9

B. 40.7

C. 140.9

D. 1659.1

PLEASE ANSWER BRAINLIEST What is the length of side q given r 20 s 30 and Q 15 Round the answer to the nearest tenth Not drawn to scale A 119 B 407 C 1409 D 165 class=

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Аноним Аноним

06-06-2018

Use the Cosine Rule

q^2 = 20^2 + 30^2 - 2^20*30 cos 15

= 140.89

so q = sqrt 140.89 = 11.9 (answer)

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