Question

Qual o valor de f(-2).g(12), sendo a função f(x) = x + 20 e g(x) = 11 - x?

A. 19

B.-24

X

C.-22

D. 16

E. - 18

me ajudem preciso rapido​

valendo 15 pontos

Answer 1

$\Large\boxed{\begin{array}{l}\sf f(x)=x+20\\\sf f(-2)=-2+20=18\\\sf g(x)=11-x\\\sf g(12)=11-12=-1\\\sf f(-2)\cdot g(12)=18\cdot(-1)=-18\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~E}}}}\end{array}}$