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3 years ago

How to calculate angle which is 25 degree?

Mathematics

1 answer:

jekas [21]3 years ago

7 0

For calculate a angle we use Protactor .
First place the protractor at 0 and starting point of angle .
Now count the angle where it meets .

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60 = 3h/4 this is for brainlessly

harina [27]

Answer:

80=h

Step-by-step explanation:

Multiply all terms by the same value to eliminate fraction denominators

4x60=4x3h/4

Then you get :

240=3h

Divide both sides of the equation by the same term

240/3 and 3/3 that means the 3 cancels out

Simply the fraction and your answer is 80

4 0

3 years ago

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A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall

Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : $\mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7$

Standard deviation : $\sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}$

$=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}$

$=\dfrac{30.265}{10}=3.0265$

The confidence interval for the population mean (for sample size <30) is given by :-

$\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=t_{9,0.025}=2.262$

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

$4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)$

Hence, 95% confidence interval for the true mean= (2.54,6.86)

7 0

4 years ago

(x+16)° (4x-5)° Find the measure of the angle. I

o-na [289]

$4x - 5 = x + 16$

Subtract the sides of the equation plus 5

$4x = x + 16 + 5$

$4x = x + 21$

Subtract the sides of the equation minus x

$3x = 21$

Divided the sides of the equation by 3

$\frac{3}{3} x = \frac{21}{3} \\$

$x = 7$

So the measure of the angle equals :

$4(7) - 5 = 28 - 5 = 23$

_________________________________

And we're done.

Thanks for watching buddy good luck.

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4 years ago

Solve the equation. X-8=x-1 OX= 1 O X= 8 Ono solution Oinfinitely many solutions

Veseljchak [2.6K]

I’m pretty sure it’s no solution

5 0

3 years ago

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Please answer this correctly

Naya [18.7K]

Answer:

20% is the correct answer

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3 years ago

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