Question

please answer this , tomorrow is my maths exam​

Answer 1

Answer:

do your self please don't copy and write. do yourself

Answer 2

Answer:

ZERO(0)

Step-by-step explanation:

13/21 + (-13/21) = 0 = (-13/21) + 13/21

13/21 - 13/21 = 0 = -13/21 + 13/21

0/21 = 0 = -13 + 13/21

0 = 0 = 0

Zero