Explanation:
a)
b) First, we have that
On the other hand,
Therefore, both expressions are equal. This makes sense, because selecting k elements from a group of n is the same than specify which elements you will not select. In order to specify those elements you need to select the n-k elements that will not be selected. Hence, each time you are selecting k from n, you are also selecting n-k from n, and from that reason both combinatorial numbers are equal.
Answer:
-1/3
Step-by-step explanation:
3x-2(4x+1)=10x+3
3x-8x-2=10x+3
-5x-2=10x+3
-5x-10x-2=3
-15x-2=3
-15x=3+2
-15x=5
x=5/-15
simplify
x=-1/3
40+20=60
90-60=30
30 divided by 60=0.3333
33.33% makes up the last classroom
Agree, just like the number Pi, if the number never ends when dividing it is irrational even if it doesn't repeat.
Answer:
<h3>The purpose of a single linear regression is <u>
To predict a dependent variable from data from multiple independent variables</u></h3>
Step-by-step explanation:
The purpose of a simple linear regression is same as a correlation in that the purpose is to measure a linear relationship between two variables to the end.
In that particular case , its purpose is to "predict" the data from a dependent variable to the data from atleast one independent variable.
<h3>The purpose of a single linear regression is <u>
To predict a dependent variable from data from multiple independent variables</u></h3>