Do you have to show ur work?
Answer:
I will answer them from top to bottom
1. 2A
2. 2A-B
3. 2A+3A
4. 2(A-B)
Step-by-step explanation:
You don't need an explanation. I am just putting this here so my answer does not get taken down.
The angle of elevation from point C to point A is 
<em><u>Solution:</u></em>
Given that we have to find the angle of elevation from point C to Point A
Given in figure that, angle A = 
Given is a right angled triangle ABC where angle B = 
We have to find angle C
The angle sum property of a triangle states that the angles of a triangle always add up to 180°
Therefore, in given triangle ABC
angle A + angle B + angle C = 180


Therefore angle C = 
Answer: C
Exp:
∠DXC = 90°
∠CXB = 90°
supplementary = 180°
90+90= 180
Unknown side = square root (100 - 49)
unknown side = square root (51)
unknown side = 7.14