Final answer:
Expressions that are equivalent to (-d9/j) are (-d-9/j) and (d9/-j).
Step-by-step explanation:
Expressions that are equivalent to (-d9/j) are (-d-9/j) and (d9/-j). Both options B and C are correct.
Let's see why:
Option B, (-d-9/j), can be rewritten as (-1)(d)(-9)(j^-1) = (d9)(j^-1) = d9/-j, which is equivalent to (-d9/j).
Option C, (d9/-j), is already in the same form as (-d9/j) and therefore equivalent to (-d9/j).