The y intercept = -4
Also, the slope of the line (if needed) is -2.
The common factor is b since they both share it.
Hope this helps
Answer:
5
Step-by-step explanation:

<em>G</em><em>CF</em><em> </em><em>=</em><em> </em><em>5</em>
Answer:
112 tiles
Step-by-step explanation:
Solution :
Group Before After
Mean 693.75 743.75
Sd 155.37 143.92
SEM 54.93 50.88
n 8 8
Null hypothesis : The preparation course not effective.

Alternative hypothesis : The preparation course is effective in improving the exam scores.
(after - before)