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x + 2x + 9y - 7y
3x + ( 9y - 7y )
3x + 2y
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Answer:
The t distribution is used, because we have the standard deviation for the sample.
Step-by-step explanation:
When to use the z or the t distribution?
When we have the standard deviation for the population, we use the z distribution.
When we have the standard deviation for the sample, we use the t distribution.
In this question:
We have the standard deviation for the sample, which means that the t distribution is used.
Answer:
B
Step-by-step explanation:
1+1=2
But 2x has to stay the same
If that’s the right equation... hopefully this helps
