Answer:
A
Step-by-step explanation:
Simple...
you have: -7=c-6
You want to isolate the variable c
-7=c-6
-7=c-6
+6 +6
-1=c
Thus, your answer.
Answer:
The answer is: 9
Step-by-step explanation:
Angles 1 and 2 are congruent because they are a pair of alternate interior angles.