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3 years ago

Help I will mark you brainly

Mathematics

2 answers:

algol [13]3 years ago

7 0

Answer:

x = 20

y = 10√3 or 17.3

Step-by-step explanation:

This is a special 30° 60° 90° right triangle

In this special triangle if the side length that sees 30° is represented by x and its given as 10 the side length that sees 90° would be twice of it so it's represented by 2x = 20 and the side length that sees 60° is x√3 = 10√3

Ludmilka [50]3 years ago

5 0

Answer:

Hi there!!

The answer would be x=20 and y= 10 root 3 or on decimal it's 17.32.

explanation look in picture, alright. 

I hope it will help u....

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3 years ago

Read 2 more answers

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Nimfa-mama [501]

Answer:

a) standard error of the mean =10.06

b) The margin of error = 17.3982

c) 95% of confidence intervals are

$(89.6018 ,124.3982)$

d) Lower limit of 95% of confidence interval = 89.6018

upper limit of 95% of confidence interval = 124.3982

The Population mean is lies between in these intervals

Step-by-step explanation:

Step(i):-

Given sample size 'n' = 20

Given sample mean was found to be 107 bpm with a standard deviation of 45 bpm.

Sample mean $x^{-} = 107 bpm$

Sample standard deviation (S) = 45 bpm

a) standard error of the mean is determined by

$S.E = \frac{S}{\sqrt{n} } = \frac{45}{\sqrt{20} }$

S.E = 10.06

b) The margin of error is determined by

$M.E = \frac{t_{\alpha } X S }{\sqrt{n} }$

The degrees of freedom ν $= n-1 =20-1=19$

$t_{\alpha } = 1.729$

$M.E = \frac{1.729X 45}{\sqrt{20} }$

$M.E = \frac{77.805 }{4.472 } = 17.3982$

c) 95% of confidence intervals are determined by

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } , x^{-} + t_{\alpha } \frac{S}{\sqrt{n} } )$

$(107 - 1.729\frac{45}{\sqrt{20} } , 107 + 1.729\frac{45}{\sqrt{20} } )$

$(107 - 17.3982 } , 107 +17.3982 )$

$(89.6018 ,124.3982)$

d)

Lower limit of 95% of confidence interval = 89.6018

upper limit of 95% of confidence interval = 124.3982

The Population mean is lies between in these intervals

4 0

3 years ago

Help I will mark you brainly​

Help I will mark you brainly