Idont know what these types of negative signs mean, i can't tell if it is just a negative number or something else..

-3+-4 = -7

Step-by-step explanation:

It is a negative number.

The negative in front of the 3 means you are short 3 of something.  The way I explain it.

You are short 3 dollars.  Then you borrow 4 dollars.  How much do you owe?

You owe $7 dollars.  -7

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.

the correct is answer is a 9-sided polygon!