First, change these equations into y-intercept form.
2x - 5y = -3 2x + 5y = 4
-5y = -3 - 2x 5y = 4 - 2x
y = 3/5 + 2x/5 y = 4/5 - 2x/5
The equations are not perpendicular to each other because the slopes are not negative reciprocal.
HOPE THIS HELPS!!!!