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3 years ago

5

Whats 7(35+5) i need it for my sexth grade exam tommorow

1 answer:

ki77a [65]3 years ago

8 0

Answer:

280

Good luck on your exam tomorrow! :-)

Step-by-step explanation:

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MULTIPLE CHOICE QUESTION

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Step-by-step explanation:

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Right triangles to find the exact length of:<br> T<br> 30°<br> 14 in<br> a) TI = in<br> 60°<br> R

ira [324]

<h3>Answer:</h3>

a) TI = 7√3 in

b) IR = 7 in

<h3>Explanation:</h3>

<u>Using cosine rule</u>:

$\sf cos(x) = \dfrac{adjacent}{hypotenuse}$

$\hookrightarrow \sf cos(30) = \dfrac{TI}{14}$

$\hookrightarrow \sf TI = 14cos(30)$

$\hookrightarrow \sf TI = 7\sqrt{3}$

<u>Using sine rule</u>:

$\sf sin(x) = \dfrac{opposite}{hypotenuse}$

$\hookrightarrow \sf sin(30) = \dfrac{IR}{14}$

$\hookrightarrow \sf IR = 14sin(30)$

$\hookrightarrow \sf IR = 7$

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Raul used this method to find the sum of 427+316.

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It is like
427+316=743

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