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tester [92]
3 years ago
14

Someone please help me. I have 2 questions

Mathematics
2 answers:
emmainna [20.7K]3 years ago
3 0
The first question is letter C
3x + 2 + 1/(2x)

the second question is letter B
x^2 - 12
Xelga [282]3 years ago
3 0
The answer to your first question is c.
fot the second question it is b.
i hope these where the answers you where looking for

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1. A sample consists of 75 TV sets purchased several years ago. The replacement times of those TV sets have a mean of 8.2 years.
Greeley [361]

Answer:

8.2+/-0.25

= ( 7.95, 8.45) years

the 95% confidence interval (a,b) = (7.95, 8.45) years

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 8.2 years

Standard deviation r = 1.1 years

Number of samples n = 75

Confidence interval = 95%

z value(at 95% confidence) = 1.96

Substituting the values we have;

8.2+/-1.96(1.1/√75)

8.2+/-1.96(0.127017059221)

8.2+/-0.248953436074

8.2+/-0.25

= ( 7.95, 8.45)

Therefore the 95% confidence interval (a,b) = (7.95, 8.45) years

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Step-by-step explanation:

The definition of Corresponding Angle is: On the same side of the transversal. One is interior and the other is exterior.

Since ADE is interior, then the other angle must be exterior.

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