well you see i have no idea but i need to ask a question im sorry
I don't really understand the question
Answer:
1
Step-by-step explanation:
When we substract 1 from any number then will get just previous number.
Example :
Let any number 17
17-1 =16
16 is the just previous number of 17
Therefore, A number -1 = previous number
Answer will be 1
AB =

The midpoint os segment AB =

The midpoint is:
(1,-4)
If brian is 8 and his brother is twice his age, his brother is 16. His brother is 8 years older so when Brian is 11 he will be 19