a) Answer:140 ↪(3f+2g)(1) =3f(1)+2g(1) =3×50+2×(-5) =150-10 =140
b) Answer:10 ↪(fog)(-1) =f[g(-1)] =f(-3) =10 ❇NOTE: ▶(f+g)(x)=f(x)+g(x) ▶(fog)(x)=f[g(x)] {Just observe the corresponding value of x in respective functions to evaluate f(x=something) and g(x=something)