Answer:
x = 2
Step-by-step explanation:
2x - 10 + 3x - 15 = 10
5x - 25 = 10
5x = 35
x = 7
7 - 5 = 2
The tax has made rebecca and susan worse off by a total of 25 dollars ($25). The tax made it worse because the salary of susan may reduce due to the government imposes tax on dog sitting. They will worse off by a total of 25 dollars. Maybe we can conclude $200 - $175 = $25
Your two expressions for y will be equal when x=0, y=-10.
Answer:
![19.22\:](https://tex.z-dn.net/?f=19.22%5C%3A%3C%5C%3A%5Cmu%5C%3A%3C%5C%3A44.78)
Step-by-step explanation:
Tthe population is normally distributed and the sample size is
.
Since the population standard deviation
is unknown and the sample standard deviation
, must replace it, the t distribution must be used for the confidence interval.
Hence with degrees of freedom of 21,
.(Read from the t distribution table)
The 98% confidence interval can be constructed using the formula:
.
From the question the sample mean is
dollars and the sample standard deviation is
dollars.
We substitute the values into the formula to get
![32-3.527(\frac{17}{\sqrt{22} } )\:](https://tex.z-dn.net/?f=32-3.527%28%5Cfrac%7B17%7D%7B%5Csqrt%7B22%7D%20%7D%20%29%5C%3A%3C%5C%3A%5Cmu%20%5C%3A%3C%5C%3A32%2B3.527%28%5Cfrac%7B17%7D%7B%5Csqrt%7B22%7D%20%7D%20%29)
![19.22\:](https://tex.z-dn.net/?f=19.22%5C%3A%3C%5C%3A%5Cmu%5C%3A%3C%5C%3A44.78)
Therefore, we can be 98% confident that the population mean is between is between 19.22 and 44.78 dollars.
Answer:
No.
Step-by-step explanation:
This is not statistical because a statistical question is a question that can be answered by collecting data that vary. Data pertains to numbers. Your question is not asking for numbers.