hope u understand......
Evaluate x^2/y + x^2/z, if x=10, y=-5, and z=-2
2 answers:
Answer:
The answer is -70.
Step-by-step explanation:
In order to determine the answer, we have to know about "replacing variables". In any expression which contains variables, we can replace them by values to get different results.
So, in this case, we have the variables "x", "y" and "z", and also we have the values to replace every variable.
Replacing those values:
Finally, the value of the expression is -70.
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Answer:
.b. It is one‐half as large as when n = 100.
Step-by-step explanation:
Given that a simple random sample of 100 batteries is selected from a process that produces batteries with a mean lifetime of 32 hours and a standard deviation of 3 hours.
i.e. s = 0.3
we obtain se of sample by dividing std devitation by the square root of sample size
i.e. s=
when n =100 this = 0.3 and
when n =400 this equals 0.15
We find that when sample size is four times as large as original, std deviation becomes 1/2 of the original
Correction option is
.b. It is one‐half as large as when n = 100.