The midpoint of SR is (5,-11) one endpoint is S (3,5) what is the y- coordinate of point R

Why the moon is not visible from earth during the new moon ?

Which example gives the relative location of a place? 50 main street 33 degrees n latitude, 91degrees w longitude east of the library 1600 pennsylvania ave., washington, d. c.

One disadvantage that darwin faces today is w. enemy attacks x. natural disasters y. lack of land bridge z. high population density