Answer:lol I need to focus on school as well :/
Step-by-step explanation:
Answer:
The degrees of freedom for this problem are 21
Step-by-step explanation:
Degrees of freedom:
When testing an hypothesis involving two samples, the number of degrees of freedom is given by:

In which
is the size of the first sample and
is the sample of the second sample.
In this question:
Samples of 9 and 14, so 
The degrees of freedom for this problem are


The degrees of freedom for this problem are 21
It is D.
you must multiply the second equation by 3, so that the +3y in the first equation can cancel out the (now) -3y in the second equation.
Answer -4+X/2=7
-4+X=14
X=18
5+Y/2=-9
5+Y=-18
Y=-23
18,-23
Step-by-step explanation:
Answer:
The width equals 2x+3
Step-by-step explanation: