1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vanyuwa [196]
3 years ago
15

I need help with this .

Mathematics
1 answer:
Artist 52 [7]3 years ago
4 0

Answer: electricity can be used to create magnetism

Step-by-step explanation:

You might be interested in
The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp
motikmotik

Answer:

The 95% confidence interval for the population mean rating is (5.73, 6.95).

Step-by-step explanation:

We start by calculating the mean and standard deviation of the sample:

M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{50}(6+4+6+. . .+6)\\\\\\M=\dfrac{317}{50}\\\\\\M=6.34\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{49}((6-6.34)^2+(4-6.34)^2+(6-6.34)^2+. . . +(6-6.34)^2)}\\\\\\s=\sqrt{\dfrac{229.22}{49}}\\\\\\s=\sqrt{4.68}=2.16\\\\\\

We have to calculate a 95% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=6.34.

The sample size is N=50.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

s_M=\dfrac{s}{\sqrt{N}}=\dfrac{2.16}{\sqrt{50}}=\dfrac{2.16}{7.071}=0.305

The degrees of freedom for this sample size are:

df=n-1=50-1=49

The t-value for a 95% confidence interval and 49 degrees of freedom is t=2.01.

The margin of error (MOE) can be calculated as:

MOE=t\cdot s_M=2.01 \cdot 0.305=0.61

Then, the lower and upper bounds of the confidence interval are:

LL=M-t \cdot s_M = 6.34-0.61=5.73\\\\UL=M+t \cdot s_M = 6.34+0.61=6.95

The 95% confidence interval for the mean is (5.73, 6.95).

4 0
3 years ago
What is -7x+3y=-24+7x -2x+5y=-11
Anastaziya [24]
-7x+3y=-24+7x-2x+5y
-7x+3y=5x+5y-24
-12x-2y=-24

-7x+3y=-11

-36x-6y=-72
-14x+6y=-22
-50x=-94
Okay well I did something wrong
7 0
3 years ago
The SAT mathematics scores in the state of Florida for this year are approximately normally distributed with a mean of 500 and a
Radda [10]

Answer:

The correct answer is 47.5%, or 0.475.

Step-by-step explanation:

3 0
3 years ago
Francesca wants to convert 1 meter to feet. Use what you know about customary measures to explain how she could do this.
Volgvan
Turn the feet into meters 1 meter = 100cm and if there is 12cms in a foot than divide 100cm by 12cm and you get 8.3ft
5 0
3 years ago
1. If 5x + 6 = 10, what is the value of 10x + 3?
Digiron [165]
Here the question is simple.
All because, we only need to find the value of x.
We are given two equations.
5x + 6 = 10 and 10x + 3 =?
So, we will find the the value of x in the first equation, so that we can substitute the value of x in the second one and there we are with the answer.
5x + 6 = 10
For finding the value of x, all we have to do is,
Transpose the number 6 to 10
Therefore. 5x = 10 - 6 ( Take the equal sign as The Magic Bridge on which if anyone crosses it , will change its sign.)
So we have,
5x = 4
So x = 4/5 ( Multiplication will change to division after crossing the equal sign)
( Doubtful? Substitute the value of x and try!)
Now that we got the value of x,
We can just simply substitute the value of x in the second equation.
10x + 3 = ?
x = 4/5
10*4/5 +3 => 5 and 10 get canceled to 2 at the numerator.
By normal multiplication and then addition, we will get,
8 + 3 = 11
Hope this helps!!!! :)
6 0
3 years ago
Read 2 more answers
Other questions:
  • A value two standards deviation from the mean is more likely to occur than a value three standard deviations from the mean.
    15·2 answers
  • PLZ ANSWER PLZ PLZ PLZ HELP 1 QUESTION!!!
    8·1 answer
  • What is mBC? Please help
    7·1 answer
  • Please tell me what 1+1 is ??????
    6·2 answers
  • Is a vertical line a function
    7·1 answer
  • Find the missing angle
    13·2 answers
  • Solve The Following System of equations by graphing<br><br>3x + y = 5<br>x - 4y = 32​
    6·1 answer
  • Rewrite 8x - 7 as the product of two factors
    10·1 answer
  • 2x +4&gt;- 6 and 5x -12&lt;3<br>​
    15·1 answer
  • Which of the following inequalities is the correct translation for the expression: “Three less than twice a number is greater th
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!