Question

Answer 1

\(=-\dfrac{5}{7}\left(\dfrac{2}{11}+\dfrac{9}{11}\right)+\dfrac{12}{7}\\ =-\dfrac{5}{7}\cdot1+\dfrac{12}{7}\\ =-\dfrac{5}{7}+\dfrac{12}{7}\\ =1\)

Answer 2

`-5/7 . 2/11 + -5/7 . 9/11 + 12/7`

`= -5/7 . (2/11 + 9/11) + 12/7`

`= -5/7 . 1 + 12/7`

`= -5/7 + 12/7`

`= (-5 + 12)/7`

`= 7/7 =1`

Answer 3

`[-5]/7 . 2/11+[-5]/7 . 9/11+12/7`

`=[-5]/7 . (2/11+9/11)+12/7`

`=[-5]/7 . 11/11+12/7`

`=[-5]/7+12/7=7/7=1`

Answer 4