In order to solve this exercise, you need to remember the following Sign Rules:
[tex]\begin{gathered} +\cdot+=+ \\ -\cdot-=+ \\ -\cdot+=- \\ +\cdot-=-_{} \end{gathered}[/tex]Then, given:
[tex]8-(-11)[/tex]You have to multiply the negative signs:
[tex]=8+11[/tex]Finally, since both numbers are positive, you have to add them. The sum (the result of the Addition) will be positive. Therefore, you get:
[tex]=19[/tex]The answer is:
[tex]=19[/tex]