For this case we have the following fractions:
A. 
B .
C. 
D. 
E .
As noted, the last four fractions result in -4. So, they are equivalent fractions.
Answer:
Option B, C, D, E. They are equivalent fractions.
Answer:
3 is correct answer
Step-by-step explanation:

hope it helped you:)
Must be simplified. don;'t really know if we should do distributive property
Answer:
hehejejejejejejejejeheheheheheStep-by-step explanation:
To do this, change into common denominators. The common denominator is 21 so change the problem from 1/3 + 1/7 to 7/21 + 3/21. This gives you 10/21. It is already in simplest form.