Question

2. Sabe-se que x= (1/2)x(- 1/3) e y= (-3/5): (-0,5). Qual o valor de x:y?
(A) +5/9
(B) +1/20
(C)-1/20
(D)-5/9

​

Answer 1

Resposta:

-5/9

Explicação:

x = (1/2)÷(-1/3)

x = (1/2)×(3/-1)

x = 3/-2

y = (-3/5)÷(-0,5)

y = (-3/5)÷(-1/2)

y = (-3/5)×(2/-1)

y = -3×2/5×(-1)

y = -6/-5 = -6÷(-1)/-5÷(-1) = 6/5

x÷y =

(3/-2)÷(6/5) =

(-2/3)×(5/6) =

-2×5/3/6 =

-10/18 = -10÷2/18÷2 = -5/9