(-9)+(-6)= Is +15 or -15?
It would come out to -15.
Say you owe someone $9, (which is -9) then tomorrow you owe that person $6 more (which is the -6)
How much do you owe them now? Well, you owe them $15 so the answer is -15.
(-9)+(-6)= Is +15 or -15?
