Use the protractor. Put the purple dot on the vertice and the make sure the line is lined up with the bottom and your answer should be lined up.
This is not possible, because if you had 11 coins, then not even 11 dimes will cover it, because 11*10 is 110, or $1.10
can you show me a picture then maybe i can help you
I think the correct answer would be : (-8,3)
I hope this helps !