Answer:
Okay so there are a few ways you can go about doing this.
Step-by-step explanation:
For number 1 you could say 5 - 7 = -2. I don't know if you need to use the same numbers for both the equations in number one, but 5 x -7 could work too.
For number 2 you could say 2 + 2 = 4 or 3 + 1 = 4. As for __ x __ = -5 you could say 2.5 x -2.5 = -5.
The rule is if you multiply a positive by a negative you get a negative. Just like if you multiply a negative by a negative you get a positive. And if you multiply a positive by a positive you get a positive.
I really hope this helps since it took me a while to understand what you were asking.
8n + 12 +(-9) -(-6n)
12 + -9 = 12-9 = 3
8n - (-6n) = 8n + 6n = 14n
The equation becomes 14n + 3
ML stands for milliliters. The prefix milli means 1,000. One liter contains 1,000 milliliters.
Therefore you want to convert the 200 mL to liters by dividing by 1,000. This gives you 200mL = 0.2L.
If you subtract the 0.2L from 1.2L you get 1L left.