Question

la pregunta es
10/3 = K/9

Answer 1

                       PROPORCIONES

$\mathrm{\dfrac{10}{3}=\dfrac{K}{9} }\\\\\mathrm{10 \times 9=3K}\\\\\mathrm{90=3K}\\\\\Large\boxed{\mathbf{30=K}}$

RPTA: K = 30

Saludos, Math_and_fisic_girl