Number 2 is not an equation.
Answer:
D
Step-by-step explanation:
well the anser has to equal 9 if you solved the question correctly BUT the other questions have to equal 9 so the first one is like this
(3*2-2)+(5*2+5*-1)
= (6-2)+(5*2+5*-1)
= (4)+(5*2+5*-1)
= 4+(5*2+5*-1)
= 4+(10+5*-1)
= 4+(10+-5)
= 4+(10-5)
= 4+(5)
= 4+5
= 9
Now the answers A is not it because
8*2+5*-3
= 16+5*-3
= 16+-15
= 16-15
= 1
B isnt it because
8*2+5*-1
= 16+5*-1
= 16+-5
= 16-5
= 11
And C isnt it because
2*2+5*-3
= 4+5*-3
= 4+-15
= 4-15
= -11
So that leaves D and this is how it is correct
= 8*2+7*-1
= 16+7*-1
= 16+-7
= 16-7
= 9
Hope this helps! Sorry I took so long
Answer: 2. To avoid bias
Explanation:
The random sampling can be defined as the method of selecting the samples from the population of interest randomly. The main advantage of this method is to select the samples from the target population and eliminating the bias in sampling. The random sampling is least choice of sampling for research purpose as the researcher wants to choose only selected desired samples for the study.
Answer:
The slope is 
Step-by-step explanation:
Let 
and 
The slope is given by;
We plug in the values to get;
Simplify;
