Question

simplify it (-7/9)+2+(6/-7)-13/21

Answer 1

Answer:-0.253968255 which can be changed to 3 significant figures = -0.254

Step-by-step explanation:

first -7/9=-0.7777777

then 6/-7=-0.857142857

also -13/21=-0.619047619

so -0.777777777+2=1.222222222

1.222222222+0.857142857=0.365079364

0.365079364-0.619047619=-0.253968255

Answer 2

Answer:

384/-189

Step-by-step explanation:

-7/9 + 2 = -5/9

-5/9 + 6/-7 = ?

LCM => -63

• -5/9 × -7/-7 = 35/-63

• 6/-7 × 9/9 = 54/-63

35/-63 + 54/-63 = 89/-63

89/-63 - 13/21

= 267/-189 - (-117/-189)

=> 384/-189