Answer:
VERY HARD QUESTIONS SO I WILL TELL YOU LATER
Subtract 7 from 9. You get 2. It is the "extra". The answer, therefore is 1 2/7
Answer:
Step-by-step explanation:
read the picture
Answer: 0.0108
Step-by-step explanation:
Given : 
Since the alternative hypotheses is right-tailed, so the test is a right-tailed test.
Sample size : n=30
The degree of freedom for t-distribution= 
The by using the normal t-distribution table , we have
The P-value corresponds to t-statistic vale 2.43 and degree of freedom 29 , is 0.01075997 i.e. approximately 0.0108
12x-3y=21
4x-y=7
I hope this helps