Answer:
The correct option is A.
Step-by-step explanation:
Let one white tile equal +1 and one black tile equal –1. It means the sum of one white tile and 1 black tile is 0.
We need to find the value of 6-(-9).
6 means 6 white tiles.
-9 means 9 black tiles.
-(-9) means 9. It represents 9 white tiles.
Now, we have total 15 white tiles.
6-(-9)= 6+9 = 15
The value of 6 – (–9) is 15. Therefore the correct option is A.
