Answer :

AL2006
The difference between 8 and -9 is 17.

4 less than that is 13.
[tex]the\ difference\ between\ 8\ and\ (-9)\ is\ \ \ \ 8-(-9)=8+9=17\\\\4\ less\ than\ 17\ is\ \ \ \ 17-4=13\\\\Ans.\ 13 [/tex]