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3 years ago

Please help quick | x | + 2 > | x | for all real numbers x. True False

Mathematics

2 answers:

RUDIKE [14]3 years ago

7 0

Answer:

true

Step-by-step explanation:

scZoUnD [109]3 years ago

6 0

This is true because x equals the same...2!

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assume the age of night school students is normally distributed. A simple random sample of 24 night school students had an avera

aleksley [76]

Let
n = number of data
s = standard deviation (sample)
S = standard deviation (population)

The working equations is

$\frac{(n-1) s^{2} }{ x^{2}_{right} } \ \textless \ S^{2} \ \textless \ \frac{(n-1) s^{2} }{ x^{2}_{left} }$

To find $x^{2}_{right}$ , : (1 - 0.90)/2 = 0.05

To find $x^{2}_{left}$ , : 1 - 0.05 = 0.95

Degrees of freedom = n-1 = 24 - 1 = 23

This is shown in the figure attached. Since there is no row for df=23, we interpolate. Thus,

$x^{2}_{left} = 13.093$

$x^{2}_{right} = 35.17$

Substitute all values,

$\frac{(24-1) 5.6^{2} }{ 35.17} \ \textless \ S^{2} \ \textless \ \frac{(24-1) 5.6^{2} }{ 13.093} }$

Thus the answer is,

$20.51\ \textless \ S^{2} \ \textless \ 55.09$

5 0

3 years ago

I need some help with this! I will try to give brainliest!!

nikdorinn [45]

Answer:

Left yes

right no

Step-by-step explanation:

that goes for top and bottom

6 0

3 years ago

Use the line plot below to determine the number of times less than 14 pieces of trash were collected at recess.

ICE Princess25 [194]

C. Which is 6. Hope this helps

3 0

2 years ago

The measure of the angles of a triangle are in the extended ratio of 3 : 7 : 10. Find the measures of the angles.

olga2289 [7]

Answer:

A. 27 degrees, 63 degrees, 90 degrees.

Step-by-step explanation:

Let the angle of the triangle be x

Given the following data;

3 : 7 : 10 = 3x : 7x : 10x

We know that the sum of the sides of a triangle is equal to 180 degrees.

3x + 7x + 10x = 180

20x = 180

x = 180/20

x = 9

For the first side;

3x = 3 × 9 = 27°

For the second side;

7x = 7 × 9 = 63°

For the third side;

10x = 10 × 9 = 90°

Therefore, the ratio of the angles of the triangle is 27° : 63° : 90°.

7 0

3 years ago

Read 2 more answers

Simplify secxcscx/1+tan^2x.

frosja888 [35]

Answer:

It's cot x :)

Step-by-step explanation:

I'm not really good at explaining,but I know that's the answer :))

8 0

4 years ago