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3 years ago

A closed plain forgive with all sides congruent and all angles congruent is called a

Mathematics

1 answer:

astraxan [27]3 years ago

8 0

Answer:

Polygon. A closed plane figure for which all sides are line segments. The name of a polygon describes the number of sides. A polygon which has all sides mutually congruent and all angles mutually congruent is called a regular polygon.

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Evaluate 2r +1 if r=3

Evgesh-ka [11]

Answer:

Step-by-step explanation:

So, substitute in your 4 for r, 2(3) + 1. Multiply 2 and 3 to get 6 and then add a to get 7. I hope this helps :)

6 0

3 years ago

The weekly salaries of sociologists in the United States are normally distributed and have a known population standard deviation

Lostsunrise [7]

Answer:

$ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

The confidence level is 0.98 and the significance is $\alpha=1-0.98 =0.02$ and $\alpha/2 =0.01$ and the critical value using the table is:

$z_{\alpha/2}= 2.326$

And replacing we got:

$ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76$

Step-by-step explanation:

For this case we have the following info given:

$\sigma = 425$ represent the population deviation

$n =22$ the sample size

$\bar X =1520$ represent the sample mean

We want to find the margin of error for the confidence interval for the population mean and we know that is given by:

$ME =z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

The confidence level is 0.98 and the significance is $\alpha=1-0.98 =0.02$ and $\alpha/2 =0.01$ and the critical value using the table is:

$z_{\alpha/2}= 2.326$

And replacing we got:

$ME=2.326 \frac{425}{\sqrt{22}}= 210.760\ approx 210.76$

3 0

3 years ago

4y-x 3(2x+y) when x = -3 and y = 3

yan [13]

Step-by-step explanation:

4×3-(-3)=12+3=15

3(2×(-3)+3)=3(-6+3)=(3×(-3)=-9

6 0

3 years ago

Help please!!!!!!!!!!!!!!

zhenek [66]

Answer:

y=-1/3x+9

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Solve for f: f/−3.2 =0.01 f=?

I am Lyosha [343]

Answer:

f= -.032

I hope this helps!

3 0

3 years ago

Read 2 more answers