Answer:
The coordinate of point A is -138
Step-by-step explanation:
we know that
The formula to calculate the midpoint between two points is equal to
[tex]M(\frac{x_1+x_2}{2})[/tex]
In this problem
[tex]x_1=-100\\M=-119[/tex]
substitute
[tex]-119=\frac{-100+x_2}{2}[/tex]
solve for x_2
[tex]-119(2)=-100+x_2[/tex]
[tex]x_2=-238+100\\x_2=-138[/tex]
therefore
The coordinate of point A is -138
