Answer:
Step-by-step explanation:
i think it’s just a glitch i keep getting those messages because i answered a question that got deleted
Answer: 
Step-by-step explanation:
1. By definition, you have if
, then 
2. Keeping this on mind, you must follow the proccedure shown below:
- You have that:

Where:

- Substitute values into
. Then, you obtain:
In order to solve for r you have to place all the number in one side. then isolate r ...... r=1
Answer
-19
Step-by-step explanation:
AS WE NEED TO FIND THE DIFF SO -8-11=-19