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allochka39001 [22]
3 years ago
14

I need help ASAP!!!!!

Mathematics
1 answer:
navik [9.2K]3 years ago
5 0
The answer is 10.8. 22-11.2 = 10.8
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I WILL GIVE BRAINLIEST TO WHOEVER GETS IT RIGHT.
zhenek [66]

Answer:

(5/6)

Step-by-step explanation:

Bc (2/3)=0.666666666667....

(2/15)*(4/5) doesn't make 0.666666666667

(4/5)*(5/6)= 0.666666666667

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3 years ago
Solve the simultaneous equation:<br> 5 x + 2 y = 25 <br> 5 x − y = 10
Liono4ka [1.6K]

Answer:

(x, y) = (3, 5)

Step-by-step explanation:

5x+2y=25\\5x-y=10

Solving by elimination here again, there are 2 good options available. Either multiply the whole bottom equation by -1 to cancel the x, or by 2 to cancel the y. I'll do the latter:

5x+2y=25\\\\2(5x-y=10)\\10x-2y=20

Add from top to bottom:

\rightarrow (5x+10x)+(2y-2y)=25+20\\\rightarrow 15x=45\\\rightarrow x=3

Now, with the value of x, solve for y in either of the equations. I'll choose the second one here:

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(x, y) = (3, 5)

4 0
2 years ago
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3 years ago
What percentage of the data falls outside 1 standard deviation of the mean?
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We all know about the bell curve i.e. normal distribution curve. It is centered about the mean and spread equally on each side.

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With in 1 standard deviation about the mean i.e. from -1 s.d. (left of mean) to +1 s.d. (right of mean), it covers 68% of the total area of curve.

So, the data that falls outside 1 standard deviation of the mean would be equal to (100% - 68%) i.e. 32%.

So, 32% is the final answer.

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3 years ago
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jek_recluse [69]
Because they do not have like bases. 
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3 years ago
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