Answer:
-8(7y-8)-3(7y-7)−8(7y−8)−3(7y−7)
Distribute to remove the parentheses.
Collect like terms
-154y+170
Step-by-step explanation:
10×4,000=40,000 because all u do is add an extra zero everything you multiple something by ten
Answer:
Lines 1 and 2.
Step-by-step explanation:
Parallel lines have the same slope. lines 1 and 2 both have a slope of -3
Answer:
The 99% confidence interval of the standard deviation of the pulse rates of men is
![[ 7.949 \ \ , \ 14.387 ]](https://tex.z-dn.net/?f=%5B%207.949%20%5C%20%20%5C%20%2C%20%5C%20%2014.387%20%5D)
Step-by-step explanation:
From the question we are told that
The sample size is n = 40
The mean is 
The standard deviation is 
Generally the degree of freedom is mathematically represented as

=> 
=> 
From the question we are told the confidence level is 99% , hence the level of significance is

=> 
Generally from the chi distribution table the critical value of at a degree of freedom of is

Generally from the chi distribution table the critical value of at a degree of freedom of is

Generally the 99% confidence interval of the standard deviation of the pulse rates of men is mathematically represented as

=> 
=> ![[ 7.949 \ \ , \ 14.387 ]](https://tex.z-dn.net/?f=%5B%207.949%20%5C%20%20%5C%20%2C%20%5C%20%2014.387%20%5D)