F 16 LB of fertilizer will cover 1500 ft.² of loan how much fertilizer is needed to cover 2500 ft.²
1 answer:
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For this case we have the following system of equations:
We multiply the first equation by -4:
We have the following equivalent system of equations:
We add the equations:
We find the value of the variable "x":
Thus, the solution of the system is:
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ANswer:
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The standard error of the mean is 12.
The standard error of the mean points to the standard deviation of the distribution of a sample mean obtained from a population.
The standard error S.E of the mean can be calculated by using the formula:
where;
- standard deviation
= 24
- sample size n = 4
S.E = 12
Learn more about the Standard error of the mean here: