Question

(-2)×(-2/5)+(+3,4)×(+1/2)

Answer 1

Bom día!! 

(-2)×(-2/5)+(+3,4)×(+1/2)

$(-2)*(- \frac{2}{5})+(+3,4)*(+ \frac{1}{2})= \\ \\ (-2)*(- \frac{2}{5})+(+ \frac{34}{10})*(+ \frac{1}{2})= \\ \\ ( \frac{(-2)*(-2)}{5})+( \frac{+34*+1}{10*2})= \\ \\ ( \frac{+4}{5})+( \frac{+34}{20})= \\ \\ ( \frac{+4*4}{5*4})+( \frac{+34}{20})= ( \frac{16}{20})+( \frac{34}{20})= \frac{16+34}{20}= \frac{50}{20}= \boxed{ \frac{5}{2}}$