Question

a) (-3/5)∙(2/3+5/4)=

b) (-3/5)∙2/3+(-3/5)∙5/4=

c) (4/5)∙(-10/3)-3/4=

d) -7/2:(2/5∙5/4)=

Answer 1

Resposta:

a)0,89

desculpe to sem tempo mais consegui a resposta da letra A    

Explicação passo-a-passo:

 

Answer 2

Resposta:

$\left(-3/5\right)\left(2/3+5/4\right)\\\\\frac{-3}{5}\left(2/3+5/4\right)\\\\\frac{-3}{5}\cdot \frac{23}{12}\\\\-\frac{23}{20}$

$\left(-3/5\right)\cdot \:2/3+\left(-3/5\right)\cdot \:5/4\\\\\frac{-3}{5}\cdot \:2/3+\left(-3/5\right)\cdot \:5/4\\\\\frac{-3}{5}\cdot \:2/3+\frac{-3}{5}\cdot \:5/4\\\\-\frac{2}{5}+\frac{-3}{5}\cdot \:5/4\\\\-\frac{2}{5}-\frac{3}{4}\\\\-\frac{23}{20}$

$\left(4/5\right)\left(-10/3\right)-3/4\\\\\frac{4}{5}\left(-10/3\right)-3/4\\\\\frac{4}{5}\cdot \frac{-10}{3}-3/4\\\\-\frac{8}{3}-3/4\\\\-\frac{8}{3}-\frac{3}{4}\\\\-\frac{41}{12}$

$-7/2\div \left(2/5\cdot \:5/4\right)\\\\-7/2\div \frac{2}{4}\\\\-7$