Answer:
You got the first two correct, both negatives. But, number 15 is a positive.
Step-by-step explanation:
3)
ex.
[tex] \frac{ - 1}{ - 1} = + 1[/tex]
[tex] \frac{ + 1}{ - 1} = - 1[/tex]
In order to receive a positive at the end, the second step's (-1) needs to be placed with (+1).
[tex] \frac{ + 1}{ + 1} = + 1[/tex]
Of course, the positive sign doesn't need to be put in front of the one, it is just used for visual purposes.
