Question

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Answer 1

Resposta:

$\frac{17}{20}$

Explicação passo-a-passo:

$x=\frac{4}{5}+\frac{1}{2}$

$x=\frac{8}{10}+\frac{5}{10}$

$x=\frac{8+5}{10}$

$x=\frac{13}{10}$

$y=\frac{2}{3}-\frac{1}{6}$

$y=\frac{4}{6}-\frac{1}{6}$

$y=\frac{4-1}{6}$

$y=\frac{3}{6}$

$y=\frac{1}{2}$

$z=(\frac{3}{2})^{2}$

$z=(\frac{3^{2}}{2^{2}})$

$z=(\frac{9}{4})$

2x + y - z

$=2.(\frac{13}{10})+(\frac{1}{2})-(\frac{9}{4})$

$=(\frac{2.13}{10})+(\frac{1}{2})-(\frac{9}{4})$

$=(\frac{26}{10})+(\frac{1}{2})-(\frac{9}{4})$

$=(\frac{26.2}{20})+(\frac{1.10}{20})-(\frac{9.5}{20})$

$=(\frac{52}{20})+(\frac{10}{20})-(\frac{45}{20})$

$=\frac{52+10-45}{20}$

$=\frac{17}{20}$