Question

Which expression gives the unit length of the line segment with the endpoints (-12, 8) and (2, 8)

|-12| + |2|
|-12| - |2|
|8| + |8|
|8| - |8|

Answer 1

First one.

Explanation:

|-12| = 12

|2|= 2

unit length = 14.

Answer 2

they have the same y coordinate, 8, so all we need to figure out is the distance between -12 and 2 of this horizontal line.
to do this add 12 and 2, you should get 14.
now using this information, find the expression that is equal to 14.
|-12|+|2|=14
|-12|-|2|=10
|8|+|8|=16
|8|-|8|=0
as we can see, the first expression would be the correct one.