1) given
2) def of midpoint
3) substitution property of equality
Answer: -3 2/5
Step-by-step explanation:
When both integers are negative, you can treat them the same as positive numbers and add a negative sign to your final sum.
1+2 2/5 (or 2 4/10 or 2.4) is equal to 3 2/5. So (-1)+ (-2 2/5) is equal to -3 2/5, or -3.4.
The answer for this is (0,8) and (8,0)
I think it's because if you can't caculate it or you want a rough answer you can estimate. For example you are estimating the height of a tall building. You would just want to estimate it first.