-3/4 pi
Do the equation -135/180 = 180/pi and simplify
Answer:
B.) 
Step-by-step explanation:

A negative and a negative equals a positive. Remove parentheses and simplify

Done.
Answer:
577
Step-by-step explanation:
Answer: Where are the lines?
The x=7y-4 one and put it to where the x in the other equation is.