Question

-9-(-13)

Answer 1

4

Answer 2

thanks..would you mind checking some of my problems for me please?

Answer 3

sure

Answer 4

5+2x+1=6+2x

Answer 5

that's right

Answer 6

what about 3+2=2+3..is that the communative property

Answer 7

yes

Answer 8

okay... 22+[6+(-11)]= 17

Answer 9

no if that's an absolute value sign it should be 27.
22+[6-11]
22+[-5]
22+5=27

Answer 10

okay thank you....-2+4n+9+(-7)=4n