Question

me ajudem por favor ​

Answer 1

$a) \\ \\ ( \frac{2}{5} + \frac{4}{3} ) = \\ \\ \frac{6 + 20 }{15} \\ \\ \frac{26}{15}$

$b) \\ \\ (7 \times \frac{7}{5} ) \div \frac{7}{15} \\ \\ \frac{49}{5} \div \frac{7}{15} \\ \\ \frac{49}{5} \times \frac{15}{7} \\ \\ \frac{7}{5} \times 15 \\ \\ 7 \times 3 \\ = 21$

Answer 2

Resposta:

A)13/15

B)21

Explicação passo a passo:

a)

$(\frac{2}{5}+\frac{4}{3} )*\frac{1}{2}\\\\ \frac{6+20}{15}*\frac{1}{2} \\\\\frac{26}{15}* \frac{1}{2}\\\\\frac{26}{30} \\\\ \frac{13}{15}$

b)

$(7*\frac{7}{5} ):\frac{7}{15} \\\\\frac{49}{5} :\frac{7}{15} \\\\\frac{49*15}{5*7} \\\\\frac{49*15}{35}\\\\21$