If you mean 0.702 divided by 10 then the answer would be 0.0702. But your question is very... uh... vague because I'm positive no one has heard of 2 thousands 7 tens. Though I'm pretty sure you meant thousandths and tenths, but before you post a question please use correct wording and spelling.
The answer is 10 because when you subtract negatives, you're basically adding them. It's like inverse operation in a way. Think of the 9 as +9. That would mean that -1 would also have to be --1. It's not possible to have a double negative integer, and therefore you need to add.
Answer:
all real numbers
Step-by-step explanation:
I think it’s either b or c