Answer:
-4/5
Step-by-step explanation:
3/5+(-7/5)
-4/5
Answer:
b = 6
Step-by-step explanation:

The middle 50% of the data falls between 13 and 31.
The middle 50% of any data set falls within the box of a box-and-whisker plot. This particular box extends from 13 to 31, so this is the middle 50% of the data.