plz show me how to do this????

Question

Find the abscissa of the midpoint of the line segment whose endpoints are:
a. (4, 8), (10,12)
b. (6,-6), (12, -4)

Answer 1

I will do a and you need to understand it and do b

the midpoint is the difference between the two end points / 2

(10-4)/2 = 6/2 = 3 so the x mid point is 3 + 4 = 7 (or 10-3 = 7)

(12-8)/2 = 4/2 = 2 so the y mid point is 2 + 8 = 10 (or 12-2 = 10)
therefore the mid point is at (7,10); from this you should easily know which is the ordinate and which is the abscissa

Understand what I did; I found the mid point x and y values by subtracting the two values for x (or y depending on which pair we are focusing on), dividing by 2 and then adding it to the lower value (or subtracting from the higher value). Once this is done for x and for y you have the mid point's coordinates.

Understand this and then do b