Respuesta :

-6^2 - 28/4 + (-9)
Multiply -6 by it's exponent.
36 - 28/4 + (-9)
Divide 28 by 4
36 - 7 + (-9)
Subtract 7 from 36.
29 + (-9)
Add -9 to 29. This would be the same as subtracting 9 from 29(29-9).
Final Answer: 20