Respuesta :
The answer is A. -43. All of thos additions of minus values are made substraction afterwards.
If you would like to solve - 21 + (- 13) + (- 9), you can calculate this using the following steps:
- 21 + (- 13) + (- 9) = - 21 - 13 - 9 = - 43
The correct result would be A. - 43.
- 21 + (- 13) + (- 9) = - 21 - 13 - 9 = - 43
The correct result would be A. - 43.