Asquare abcd has the vertices a(n, n), b(n, -n), c(-n, -n), and d(-n, n). which vertex is in quadrant iii? b c a d

It is necessary for a coordinate to be in quadrant III that both x and y coordinate have to be negative. For e.g (-2,-2) have both x and y coordinate negative , so it is in quadrant III , where as (2,-2) or(-2,2) are not in quadrant III. In the given question C (-a,-a) have both x and y coordinates negative. SO C is in third quadrant and the correct option is C .

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong