Answer:
36
Step-by-step explanation:
The LCM of 4, 9, and 12 is the product of all prime numbers on the left, i.e. LCM(4, 9, 12) by division method = 2 × 2 × 3 × 3 = 36.
These aren't that hard--especially once you've done the first 13 questions. There are many 45-45-90 triangles in there.
14. ∠BCO = 45°
15. ∠GOF = 45°
16. ∠OFG = 45°
17. ∠GFH = 180° - ∠JFH = 58°
18. ∠FGH = 90°
19. ∠EFJ = 45°
20. ∠GOC = 180° (the points are collinear)
Answer:

Step-by-step explanation:
Given



Required
Determine the arrival time
First, we calculate the time taken from Belfast to Dublin using:

Substitute values to the expression.

Cross Multiply



Arrival time is then calculated as:


