If there are 12 shirts total and three of them were green, it would be 3 out of 12 or 3/12. Hope this helps! :)
Answer:
sample variances
Step-by-step explanation:
The pooled variance method is used to estimate the variance of several different population with different means, but are assume to have the same variance.
The weights represent the sample variances.
So the correct answer is
sample variances
Answer:
805× 4= 3220
3220÷4=805
they are interconnected answers
hope it helps ,pls mark me as brainliest
Answer:
x = 3 and x = -3 (aka. x = ±3)
Step-by-step explanation:
2x² - 18 = 0
x² - 9 = 0
x² = 9
x = ±3
Therefore, x = 3 and x = -3
Answer: 
Step-by-step explanation:
Two lines are said to be perpendicular if the product of their slope = -1
Given :
to find the slope , we will write it in the form : 
That is
which means that the slope = 
any line that is perpendicular to this line will have slope = -2
using the formula :
, we have
