Answer:
Perpendicular because the slopes are opposite reciprocals
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
n + m -2(m-m)
Combine like terms
n+m+2(0)
n+m
Let m=3 and n=2
2+3
5

I hope this this is what you need ..
z=(63-84)/3= -21/7= -3
P(x>63)=p(z > -3) = .9987 or 99.87%