Question

me ajudem a resolver isso,por favor!!

Answer 1

Resposta letra D$d =  \frac {ax + by +c}{\sqrt{}a^{2} + b^{2} } \\ d = \frac{1.3+2.5-8}{\sqrt{1^{2} + 2^{2}}}  \\ d = \frac{3+10-8}{ \sqrt{1+4} } \\ d = \frac{13 - 8}{\sqrt{5}} \\ d =  \frac{5}{\sqrt{5}}  \\ d = \sqrt{5}$