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siniylev [52]
3 years ago
15

Help help help help help help plz plz plz plz

Mathematics
1 answer:
olga2289 [7]3 years ago
8 0
21.

This is because on a normal draw, he should expect a result chance of 3/10. Changing it to fit the 70 times, you would change the denominator to 70. 10 to 70 is times 7, so three would be multiplied by seven as well.

Hope this helps!
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What is cos theta when sin theta = sqrt 2/3
Fittoniya [83]

<u>Answer:</u>

Value of cosθ is ±√7/3 .

<u>Step-by-step explanation:</u>

According to the Question , value of :

\red{\implies sin\theta = \dfrac{\sqrt2}{3}}

And , we know the identity of sine and cosine as ,

\boxed{\pink{\sf\implies sin^2\theta + cos^2\theta = 1} }

<u>Using</u><u> </u><u>,</u><u> </u><u>this</u><u> </u><u>ident</u><u>ity</u><u> </u><u>we</u><u> </u><u>have</u><u> </u><u>;</u><u> </u>

\implies sin^2\theta + cos^2\theta = 1 \\\\\implies \bigg( \dfrac{\sqrt2}{3}\bigg)^2 + cos^2\theta = 1 \\\\\implies \dfrac{2}{9} + cos^2\theta = 1 \\\\\implies cos^2\theta = 1 - \dfrac{2}{9} \\\\\implies cos^2\theta = \dfrac{9-2}{9} \\\\\implies cos\theta = \sqrt{\dfrac{7}{9}} \\\\\underline{\boxed{\blue{\bf \implies cos\theta = \pm \dfrac{\sqrt 7 }{3}}}}

Now , here since θ is in 2nd quadrant and in 2nd quadrant cos is negative . Hence ,the value of cos will be :

\boxed{\orange{\bf \implies cos\theta =-\dfrac{\sqrt7}{3}}}

3 0
3 years ago
Is (-7,2) a point on the line?​
Gala2k [10]

Answer:

what line i swear if u tell me i can answer just comment

Step-by-step explanation:

7 0
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An isosceles triangle has a base of 44 inches and an altitude of 58 inches. What is the length of each leg?
const2013 [10]

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hello! although i am not really knowlegeble about this subject,  i hope the lengths below can help you solve the problem :)

Step-by-step explanation:

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Step-by-step explanation:

6 0
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So its 8p = 56 is the frist bit and the second is 7. BOOM
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p=7, I don't know if this is a question or not

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