Answer:
1
Step-by-step explanation:
r ≡ x - 2y - 3 = 0
-x + 3=-x+3
-2y=-x+3
/-2=/-2
y=1/2-3/2
s ≡ x - 2y + 1 = 0
-x -1=-x-1
-2y=-x-1
/-2 =/-2
y=1/2x+1/2
Bs-Br
1/2-(-3/2)= 1
5.8m questions
7.5m answers