X = -1
Y=1
This should be the answer
1. Simplify the inequality 

2. Separate terms with x and without x in different sides:

3. Add similar terms:

4. Divide by 21.42:

Answer: correct choice is C.
20,
just do 5/0.25
use a calculator
(i) The bearing of B from A and angle x are supplementary, then:

(ii)
From the above diagram, the bearing angle of A from B is:

(iii)
From the above diagram, the bearing angle of C from B is:

(iv)
Applying the law of cosines with the sides AB = 145m and CB = 240 m, and the angle ABC = 68°, the distance AC is:
8=3(3x+8)-x
8=9x+24-x
-16=8x
x= -2