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yaroslaw [1]
3 years ago
9

Which of the following are solutions to | x+3 = 4x - 7? Check all that apply.

Mathematics
1 answer:
just olya [345]3 years ago
6 0

Answer:

x=​5/​4, ​3/10

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Answer:

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2 years ago
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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
∆CDE is first translated 5 units right, and then upward into ∆C'D'E'.
True [87]

Answer:

(x, y) -> (x+5, y+3)

Step-by-step explanation:

5 0
2 years ago
4 + 3s + 2<br> Terms:<br> Coefficients:<br> Constants:<br> Answer
USPshnik [31]

▬▬▬▬▬▬▬▬▬▬▬▬

<h3>4 + 3s + 2 </h3>

→ Terms - <u>Three</u> (<u>Trinomial</u>)

→ Coefficient - <u>3</u>

→ Constants - <u>4</u> and <u>2</u>

▬▬▬▬▬▬▬▬▬▬▬▬

8 0
2 years ago
The ratio of rabbits to cats is 2:4 respectively. If there are
Natasha_Volkova [10]

Answer:

there are 36 cats in one house the ratio is 1:2

Step-by-step explanation:

3 0
3 years ago
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