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Stels [109]
3 years ago
11

An expression is shown. -8+4-7-9-2+(-5) What is the value of the expression? ​

Mathematics
1 answer:
Colt1911 [192]3 years ago
4 0

Answer:

-27

Step-by-step explanation:

-8+4-7-9-2+(-5)

= -4-7-9-2-5

= -20-2-5

= -27

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The table represents a linear equation . which equation correctly uses point(-2,-6) to write the equation of this line in point-
Minchanka [31]

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3 years ago
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Maslowich

Answer:

the mean number of siblings is 8

Step-by-step explanation:

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3 years ago
Wind farm configuration is a significant issue as the upwind turbines generate maximal energy while creating wakes for downwind
lord [1]

Answer:

a) [24.114,29.2858]

b) Since 30 is not in the 95% confidence interval, there is a 95% probability that 30 is not the true mean WEP

Step-by-step explanation:

a)

The 95% confidence interval is given by the interval

\bf [ \bar x-z^*\frac{s}{\sqrt n}, \bar x+t^*\frac{s}{\sqrt n}]

where

\bf \bar x= 26.7 is the sample mean  

s = 17.7 is the sample standard deviation  

n = 180 is the sample size

Since the sample size is big enough, we can use the Normal N(0,1) to compute \bf z^* and it would be 1.96(*) (a value such that the area under the Normal curve outside the interval [-z, z] is 5% (0.05))

and our 95% confidence interval is

\bf [26.7-1.96*\frac{17.7}{\sqrt{180}}, 26.7+1.96*\frac{17.7}{\sqrt{180}}]=\boxed{[24.114,29.2858]}

(*)

This value can be computed in Excel with

<em>NORMINV(1-0.025,0,1)</em>

and in OpenOffice Calc with

<em>NORMINV(1-0.025;0;1)</em>

b)

Since 30 is not in the 95% confidence interval, there is a 95% probability that 30 is not the true mean WEP

7 0
3 years ago
What is the equation of the line with the same slope as the equation x-4y=3 and the y-intercept(0,-8)?
katen-ka-za [31]

Answer:

y = 1/4x -8

Step-by-step explanation:

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Subtract x from each side

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Divide each side by -4

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y = 1/4 x -3/4

This is in the form y= mx+b where the slope is m and the y intercept is b

The slope is 1/4

We want the same slope

y = 1/4x +b

we know the y intercept is -8

y = 1/4x -8

8 0
3 years ago
Read 2 more answers
Y = -4.r - 2<br>4x - 2y = -8 <br>​
MAXImum [283]

Answer:

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Step-by-step explanation:

is this a trues or false satement

6 0
2 years ago
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