Answer:
21
Step-by-step explanation:
9+[10+(5-4)x2]
= 9+(10+1x2)
= 9+(10+2)
= 21
the answer is 9 because it’s proportiona
Umm its backwards and yeah
No, all three lines are parallel. If line c was perpendicular to the line a, and because line b is parallel to the line a, both line a and b would be perpendicular to the line c (line b has to be parallel to the line c, therefore it's impossible)