Your sister would be 66.
When you are 10, your sister would be 6 (10-4=6)
60 years later, you would be 70, and your sister would still be 4 years younger.
Answer:
13.9
Step-by-step explanation:
Use the distance formula:

The square root of 193 rounded to the nearest tenth is 13.9.
Add them all, which is -216. Divide by the number of values, which is the mean of -36.
I think you would most likely add all of them well I think
Use Pythagorean theorem:
9i-j = sqrt (9^2 - 1^2) = sqrt(81-1) = sqrt80
now divide both terms in V by that:
u = 9/sqrt(80)i - 1/sqrt(80)j
see attached picture: