Question

Answer 1

b, 

5/4 + 3/4 ; (-3/2 ) - (-7) 

= 5/4 + 3/4 ( -2/3) - 9-7)

= 5/4 + 3 ( -2) / 4 x 3   -  (-7)

= 5/4 + -2/4 - (-7)

= 3/4 - (-7)

= 3/4 + 28/4

= 31/4

Answer 2

a) A = -14/25 . 34,8 - 13/25 . 65,2

= -14/25 . (34,8 + 65,2)

= -14/25 . 100

= -56

b) B = 5/4 + 3/4 : (-3/2) - (-7)

= 5/4 - 1/2 + 7

= 3/4 + 7

= 31/4

Answer 3

-14/25 x 34,8 - 14/25 x 65,2

= -14/25 x 174/5 - 14/25 x 62,5

= -14 x 174/ 25 x 5 - 14/25  x 62,5

= -2436/ 125 - 14/25 x 65, 2

= -2436/ 125 - 14/25 x 326/5 

= -2436/ 125 - 4564/125

= -7000/ 125 = -56