Question

Me ajudem por favor!!!!

Answer 1

Resposta:

Explicação passo a passo:

$(-\frac{5}{27} ):(-\frac{10}{9} )=$

$(-\frac{5}{27} ).(-\frac{9}{10} )=$

    $\frac{45}{270}=\frac{1}{6}$

$x=\frac{1}{6}$

$(-\frac{7}{9} ).(\frac{2}{7}).(-\frac{1}{6})=$

$\frac{2}{54} =\frac{1}{27}$

$y=\frac{1}{27}$

a)

$x+y=\frac{1}{6} +\frac{1}{27} =\frac{9}{54} +\frac{2}{54} =\frac{11}{54}$

b)

$y-x=\frac{1}{27} -\frac{1}{6} =\frac{2}{54} -\frac{9}{54} =-\frac{7}{54}$