Answer:
0.000000001
Step-by-step explanation:
1/1000×1/100000= 1/100000000= 0.000000001
3,150 doesn't need to be simplified. so, i guess if it were to be simplified, it would just stay the same.
Answer: -2
Explanation: On the image we can see it goes down 4 units and right 2. Giving us the slope 
Simplified that is -2 which is the slope of the line