6/7...
12 divided by 2 = 6
14 divided by 2= 7
hope this helps!
First, find the mean. You'll need it to compute the variance.
![\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11](https://tex.z-dn.net/?f=%5Cbar%20x%3D%5Cdisplaystyle%5Cfrac15%5Csum_%7Bi%3D1%7D%5E5x_i%3D%5Cdfrac%7B21%2B10%2B6%2B7%2B11%7D5%3D11)
The variance of the sample is then computed with the formula
![s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5](https://tex.z-dn.net/?f=s%5E2%3D%5Cdisplaystyle%5Cdfrac1%7B5-1%7D%5Csum_%7Bi%3D1%7D%5E5%28%5Cbar%20x-x_i%29%5E2%3D%5Cdfrac%7B%2821-11%29%5E2%2B%5Ccdots%2B%2811-11%29%5E2%7D4%3D%5Cdfrac%7B71%7D2%3D35.5)
The standard deviation is the square root of the variance, so
Answer:
3x + 5y
Step-by-step explanation:
The correct statement is B, D and E
<h3>What is number line?</h3>
Number lines are the horizontal straight lines in which the integers are placed in equal intervals.
The complete question is
Which rule is true for the horizontal number line?
A. All negative numbers are located to the right of zero.
B. Negative numbers are arranged in a descending order from left to right.
C. Positive numbers are arranged in a descending order from left to right.
D. All positive numbers are located to the right of zero.
E. Negative numbers are arranged in an ascending order from right to left.
All negative numbers are located to the left of zero.
Negative numbers are arranged in a descending order from left to right.
Positive numbers are arranged in a ascending order from left to right.
All positive numbers are located to the right of zero.
Negative numbers are arranged in an ascending order from right to left.
Learn more about number line here:
brainly.com/question/13189025
#SPJ1
Answer:
Step-by-step explanation:
angle 2 and angle 7 are alternate exterior angles.so they are always equal.
angle 2=angle 7