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White raven [17]
3 years ago
6

Can anyone help me out?????​

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
8 0

i think 2, 3, and 5 are true

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Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 6.8 parts
Gnoma [55]

Answer:

The test statistics fall in the critical region and hence null hypothesis is to be rejected.

Step-by-step explanation:

The null hypothesis : H0 : Mean = 6.80  

Alternative hypothesis: Ha: Mean is not equal to 6.80

As per the z statistics  

z = (x’-mean)/(sigma/sqrt n)

Substituting the given values, we get –  

z = 6.4-6.8/(1.1/sqrt 10)

z = -1.149

z test statistics is -1.149

Critical value for two tailed test at 98% confidence is .10749

The test statistics fall in the critical region and hence null hypothesis is to be rejected.

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3 years ago
Distribute and Combine Like Terms. 2(x + 7) - 2x
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Answer:

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Step-by-step explanation:

You just multiply 2 to (x + 7) which gets you 2x + 14 and then subtract 2x from 2x seeing as they are like terms and you end up with 14.

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3 years ago
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valkas [14]
I think the correct answer is A.
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2 years ago
Line segment Z E is the angle bisector of AngleYEX and the perpendicular bisector of Line segment G F. Line segment G X is the a
notsponge [240]

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Write the decimal 3.2 as an improper function?
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Answer:

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3.2 = 3 + 0.2= 3+2/10=3+1/5=16/5

pls mark as brainliest

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