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Lubov Fominskaja [6]
3 years ago
6

find the variance and standard deviation of the given set of data to the nearest tenth. 440,130,280,500,150,640,760

Mathematics
1 answer:
Westkost [7]3 years ago
8 0

Answer:

The variance is 49595.9

The standard deviation is 222.7

Step-by-step explanation:

The step -by -step explanation is shown in the picture above.

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2x+3y= 14<br>3х - 4 y = 4<br><br>​
goldenfox [79]

The solution to given system of equations are (x, y) = (4, 2)

<em><u>Solution:</u></em>

<em><u>Given system of equations are:</u></em>

2x + 3y = 14 ---------- eqn 1

3x - 4y = 4 --------- eqn 2

We have to solve the given system of equations

We can solve the above system of equations by elimination method

<em><u>Multiply eqn 1 by 3</u></em>

3(2x + 3y = 14)

6x + 9y = 42 --------- eqn 3

<em><u>Multiply eqn 2 by 2</u></em>

2(3x - 4y = 4)

6x - 8y = 8 ----------- eqn 4

<em><u>Subtract eqn 4 from eqn 3</u></em>

6x + 9y = 42

6x - 8y = 8

( - ) --------------

9y + 8y = 42 - 8

17y = 34

<h3>y = 2</h3>

<em><u>Substitute y = 2 in eqn 1</u></em>

2x + 3(2) = 14

2x + 6 = 14

2x = 14 - 6

2x = 8

<h3>x = 4</h3>

Thus the solution to given system of equations are (x, y) = (4, 2)

5 0
3 years ago
What are indications of a computer hardware problem? Check all that apply.
alexira [117]

Step-by-step explanation:

the answer is the keyboard keys getting stuck, it's something you can touch and feel, thus it's an hardware problem

6 0
3 years ago
Read 2 more answers
If the two angles are complementary, find the measure of each of angle. I am having trouble decoding this problem in it it says
telo118 [61]

Answer:

f=10

Step-by-step explanation:

I don't know a formula for this but I can see that <CRE is a 90° angle so 7f+2f=90 and if f=10 7f=70 and 2f=20 which fits

3 0
3 years ago
What is the length of AC?
natima [27]

7/x = 84 / (156 -x)
84x = 7(156 -x)
84x = 1092 - 7x
91x = 1092
x = 12

AC = 156 - 12 = 144

answer
D. 144
3 0
3 years ago
In 2010, the continent of South America had a population of 395, 280, 204 Which of the following is the closest estimate of this
lesya [120]

Given:

The population of continent of South America in 2010 is 395, 280, 204.

To find:

The closest estimate of this number.

Solution:

We have,

Population = 395, 280, 204

The approximate value of this number is

Population \approx 400, 000, 000

The scientific form of this value is

Population = 4\times 10^8

Therefore, the correct option is C.

6 0
3 years ago
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