Which expression is not equivalent to the others? explain your reasoning.
_-1/4 -1/4 1/-4 _-1/-4

The expression that is not equivalent it the last one:  -1/-4
The rest of the expressions are equal to: -0.25
The last one is: 0.25

The reason it is not equivalent is because it is a negative divided by a negative whereas the rest are a negative divided by a positive. A negative divided by a negative will equal a positive. It was the only positive integer in the expressions listed above. Thus, the answer is: -1/-4