Answer:
-27
Step-by-step explanation:
x+23−23=−4−23
x=−27
Answer:
the answer is a equation
Step-by-step explanation:
because u supposed to make it a equation in order for it to be a expression.
hope you get it right!!!!!!!!
Answer: 
Step-by-step explanation:
The confidence interval for population mean is given by :-

Given : Sample size : n= 35 , large sample (n>30)
Mean difference : 
Standard deviation : 
Significance level : 
Critical value : 
Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = 
6/8ths are left you have to cross multiply to get the answer
The value of 8 is Hundred Thousand