Answer:
1/2
Step-by-step explanation:
15.5 I believe but don’t hold me to it!
Answer:
1. No, Joe is not correct
2. 
Step-by-step explanation:
Given: b and c are parallel lines
To find:
1. whether the given statement is correct or not
2. 
Solution:
1.
Sum of two angles that form a linear pair is equal to 
(linear pair)

So, Joe is not correct
2.
If two lines are parallel then alternate interior angles are equal.
As b and c are parallel lines,
(alternate interior angles)
Since it says the sum of any number not one in specific then the value will be x, plus the sum of 7,