Answer:


Step-by-step explanation:
For this case we have the following data given:
2.3 3.1 2.8
1.7 0.9 4.0
2.1 1.2 3.6
0.2 2.4 3.2
Since the data are assumedn normally distributed we can find the standard deviation with the following formula:

And we need to find the mean first with the following formula:

And replacing we got:

And then we can calculate the deviation and we got:

Answer:
c+d
Step-by-step explanation:
c as the liters of water in the bucket, and d as the liters of water the jar more.
Together, you have to use addition to answer the question.
Note:
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<em>-kiniwih426</em>
Answer:
Two or more linear equations in the same variables; also called a linear system. ... A linear system with infinitely many solutions. System of Linear Inequalities. Consists of two or more linear inequalities in the same variable.