Are these two separate questions?
Answer:
the answer is 7
Step-by-step explanation:
8d +7=63
-7. -7
_________
8d = 56
__. ___
8. 8
56 divided by 8 is 7
Answer:

Step-by-step explanation:
Hi there!

To get rid of the fraction
, multiply both sides of the equation by 3 (the denominator):

To get rid of the fraction
, multiply both sides of the equation by 5 (the denominator):

I hope this helps!
Answer:
(4, -3)
Step-by-step explanation:
You just divide each coordinate by 3.
Answer:
(3,16)
Step-by-step explanation:
The degrees of freedom of the critical value F are (k-1,n-k).
We are given that there are four sample group, so,
k=4.
Also, we are given that the each four groups contains five observations, so,
n=4*5
n=20
The critical value F has degree of freedom
(k-1,n-k)
(4-1,20-4)
(3,16).
Thus, the degrees of freedom for the critical value of F are (3,16).