The parallel lines have the same slope.
The formula of a slope:

We have the points (2, 5) and (6, -11).
Substitute:

Answer:
7. 
Step-by-step explanation:
r^11 x r^8 =
r^11 + 8=
2^19
Answer:
13
Step-by-step explanation:
The average of any 5 consecutive numbers is the 3rd one (the middle one of the group). The third consecutive number starting from 11 is 13.
The average of {11, 12, 13, 14, 15} is 13.
Answer:
slope= 5/3
Step-by-step explanation:
y=mx+b
slope=m
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