Final answer:
The expression that doesn't belong is option C) -5 * 5 - 5 because it simplifies to -30 instead of -5 like the other expressions.
Step-by-step explanation:
The expression that doesn't belong is option C) -5 * 5 - 5.
To determine this, we need to evaluate each expression and compare the results.
A) 5 * 5 / -5 = -5: This expression simplifies to -5 when we perform the calculations in the correct order.
B) -25 / 5 = -5: This expression simplifies to -5 when we divide -25 by 5.
C) -5 * 5 - 5 = -30: This expression simplifies to -30 when we multiply -5 by 5 and then subtract 5.
D) 25 / -5 = -5: This expression simplifies to -5 when we divide 25 by -5.
Therefore, the expression that doesn't belong is option C) -5 * 5 - 5 because it simplifies to -30 instead of -5 like the other expressions.