Question

(image)
Given that a is parallel to b, if m∠9=4n and m∠1=n+90, what is the value of n?
(Hint: how are these angles related to one another?)

a.
40.5
c.
30
b.
16
d.
60

Answer 1

The answer is n=30
4n=n+90
-n -n
3n=90
N=30