Respuesta :
[tex]\begin{gathered} -r(a+b) \\ \\ r=-2 \\ a=4 \\ b=-5 \end{gathered}[/tex]
To evaluate the given equation using the given values for each variable:
-Substitute the corresponding values in the equation:
[tex]-(-2)(4+(-5))[/tex]- Eliminate parentheses:
Use the next sing rules:
[tex]\begin{gathered} +(+)=+ \\ +(-)=- \\ -(+)=- \\ -(-)=+ \end{gathered}[/tex][tex]\begin{gathered} =2(4-5) \\ \end{gathered}[/tex]- Solve operations in parentheses:
[tex]=2(-1)[/tex]- Solve multiplication:
[tex]=-2[/tex]Then, the solution is -2