assume f(x)=-2x+8 and g(x)=3x. what is the value of (f+g)(-1)

[latex]f\left( x \right) =-2x+8\\ \\ g\left( x \right)=3x[/latex] ---------- [latex]f\left( x \right) +g\left( x \right) =-2x+8+3x=x+8[/latex] ---------- Therefore: [latex]\left( f+g \right) \left( -1 \right) =\left( -1 \right) +8=7[/latex]