20x + 15k is the answer we just have to remove the bracket and add the terms
hope it helps
You have to do it to the powers of like you did with number one
Answer:
![r=\frac{2(23146)-(139)(333)}{\sqrt{[2(9661) -(139)^2][2(55457) -(333)^2]}}=1](https://tex.z-dn.net/?f=r%3D%5Cfrac%7B2%2823146%29-%28139%29%28333%29%7D%7B%5Csqrt%7B%5B2%289661%29%20-%28139%29%5E2%5D%5B2%2855457%29%20-%28333%29%5E2%5D%7D%7D%3D1)
So then the we have perfect linear association. Because the heights and weights of the men are similar.
Step-by-step explanation:
Let X represent the Height and Y the weigth
We have the follwoing dataset:
X: 70, 69
Y: 169, 164
n=2
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
And in order to calculate the correlation coefficient we can use this formula:
![r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}](https://tex.z-dn.net/?f=r%3D%5Cfrac%7Bn%28%5Csum%20xy%29-%28%5Csum%20x%29%28%5Csum%20y%29%7D%7B%5Csqrt%7B%5Bn%5Csum%20x%5E2%20-%28%5Csum%20x%29%5E2%5D%5Bn%5Csum%20y%5E2%20-%28%5Csum%20y%29%5E2%5D%7D%7D)
For our case we have this:
n=2 
And if we replace in the formula we got:
So then the we have perfect linear association. Because the heights and weights of the men are similar.
488/7
Look at the first digit of the dividend. Is there a factor that can be subtracted?
-Not, really so we go to the second digit. Now we're looking at the number 48.
Is there any factor that multiplies by 7 that can be subtracted?
-Yes, and that's 6.
Now you do 48-42=6 and drop down the remaining digits in the dividend.
- You are left with 68
Ask yourself again, is there any factor i can multiply by 7 that can be subtracted?
-Yes, and thats nine.
Subtract again and you are left with 5.
Since there's no more number from the dividend to drop down, you put a zero and keep multiplying.
i've ran outta time so the answer is : 69.7142857143
Hope you understood what i wrote.
Answer:
The answer is option B.
Step-by-step explanation:
Loretta is rolling an unfair 6 sided die with a single number between 1 and 6 on each face and she has a 70% chance of rolling a four.
She is playing a game with a friend and knows that if she rolls a four on three of her next five rolls she will lose the game.
She wants to determine the probability that she rolls a four on three of her next five rolls.
The simulation design that is helpful here is :
B) Using a table of random digits select a digit between 0 and 9. Let 0-6 represent rolling a four and 7-9 represent not rolling a four. Select five digits.
