Answer:

Step-by-step explanation:

Answer:
2/3
Step-by-step explanation:
You can cross simplify so you can cancel out the 7s because they are opposite of one another.
Sorry but..I don't even know where to start. Good luck!
9514 1404 393
Answer:
(a) 1 and 3; 2 and 4
Step-by-step explanation:
In this figure, adjacent angles are linear pairs, so are supplementary. The only angles that are not are the vertical angles.
1 & 3, 2 & 4 are not supplementary