Attached the solution and work. The x,y,n are just variables I put in so you could see how I solved for the missing angle.
Answer:
M and N
Step-by-step explanation:
It would probably depend on what you mean by "smallest". If it means "smallest in magnitude", then of course the smallest slope you can have is zero.
480.
There is 1 before 8. And 1 is below not 5 or more in order to round up to 490. So, the only choice is to stay at 480. Therefore, the answer is 480.
(x+2)/6 = 2/5
(x+2)5 = 12 <-- Cross multiply
5x = 6 <-- Transpose the 2.
6/5 = x