Two friends, alison and bernard, are
walking along two different roads. the
roads can be represented by the lines with
equations y=-*+ 410 and y=-x-100.
alison is on the first road at the point with
coordinates (0.410) and bernard is at the
point with coordinates (50 -75).
a verify that bernard is on the road with
cquation y=-x-100.
find the coordinates of the point of
intersection of the two roads.