Answer:
x = -19
Step-by-step explanation:
1. make parentheses disappeared using distribution law.

2. sum up b numbers and x

3. separate x and number to two sides of the equation

4. both side divided by -4

Answer:
I think the answer is false but im not sure
Step-by-step explanation:
i hope this helps
Answer:
The interpretation is that we are 90% sure that the true average salary of the district is in this interval.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
The 90% confidence interval for the average salary of the district is [41500,49750].
This means that we are 90% sure that the true average salary of the district is in this interval.