No not all diagonal lines are lines of symmetry! Because if you take a piece of notebook paper and fold it in half the side do not match up! hope this helps :)
Answer:
y-y1=m(x-x1)
Step-by-step explanation:
y stays as y and x stays as x, but y1, and x1, are your coordinates you use.
Answer:
-2
Step-by-step explanation:
y=-1-2x
by substitution
-1-2x=1/2x+4
5/2x=-5
x=-2
The answer is x=6
5x+38+100=168
5x+138=168
5x=30
