The 3 angles when added together make a straight line which is 180 degrees. To find x subtract the 2 known angles from 180.
The answer would be x = 180 - (67 + 52)
The answer is a, .0008 kg. Weight cannot be compared to length.
The simplified form of 8/48 is, 1/6 because 8/4=2
48/4=12
So you get 2/12
Then simplify that by dividing by 2 and you get 1/6
1/2 for the first one
-3 for the second one