Jenna multiplied four numbers together and then divided by -2. the result was a positive value.

which of the following statements must be true?
none of the factors were negative.
all of the factors were negative.
an odd number of factors were negative.
an even number of factors were negative.

The answer is " An odd number of factors were negative."This is true because when you multiply a negative and a positive you get a negative. So that would be one pair since it was odd so that gives you a negative at the end of the four and the rule also applies to dividing so a negative divided by the negative you got will get you the answer of a positive. Work:
(1)Positive*(2)Negative= Negative
(Answer)Negative*(3)Negative= Positive
(Answer)Positive*(4)Negative= Negative
(Answer)Negative/Negative= Positive
Hope this helped! If not please provide some feedback!

I'm not sure exactly but my best guess would be 1/4