Answer:
sometimes
Step-by-step explanation:
20%
decreased score= 80-64 = 16
x% of 80 = 16
x=20
slope perpendicular= -1
3x-3y=-63
-3y=-3x-63 divide both sides by -3
y=1x+21
Perpendicular lines have slopes that are the opposite of the reciprocal of each other
