Choice A is correct
BC=DC
the two triangles share one angel C
the two triangles each have a right angle
so they are congruent according to Angle-Side_Side Theorem
You need to get x alone on one side. You need to divide 1/2 on both sides which makes 13 a 26. x<26
The answer would be £480 because 20% of 600 is 120 and 600 take away 120 is 480
11.5 x 3.2 = 36.8m
-36.8 meters change in elevation
I think the answer would be A. I hope this helps. But i am not that sure