Respuesta :

[tex]Subtitute\ the\ values\ of\ r=-14.1\\and\ s=18.3\ to\ the\ expression\ r+s:\\\\r+s=-14.1+18.3\\---------\\use\ commutative\ property:a+b=b+a\\\----------\\\\=18.3+(-14.1)=18.3-14.1=\huge\boxed{4.2}[/tex]