What is the answer for -16x = 80

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points