Answer:
5, 8.7, 2/3
Explanation:
for for positive x value put the value in the positive X function which is x because x>0 and for the negative x value put the value in Negative X function which is -x because x<0
5 is positive
so x=5
when x is -8.7 is negative
so put the value in negative function
-(-8.7) = 8.7
same for last one -2/3
-(-2/3) = 2/3