Answer:
y=-1/2x + 3/2
Step-by-step explanation:
11) x = 45
12) x = 30
11)
3x + x = 180
4x = 180
x = 45
12)
4x = 5x - 30
4x - 5x = -30
-x = -30
x = 30
km stands for kilometers
y-4x-6
I'm not 100% sure but I think this is correct!