Commutative law: a+b=b+a thats it...
So 9+7 can also be written as 7+9=16
1 km = 1000m
1 hr = 3600 s
189 km/h
189 * 1000 / 3600 m/s
189*5/18 m/s
945/18 m/s
315/6 m/s
105/2 m/s
52.5 m/s
in 10 s
52.5*10
525 m
I think the answer would be x= 4/7 y = +-16/7
The answer is a=6, b=4, and 0=3 you can always try to find the answer in google though
Hope that helped
Answer:

Step-by-step explanation:
How do we find the line that's perpendicular to another?
We find the negative reciprocal. So for example if our slope is 2, the negative reciprocal would be
.