It becomes a vertical line, because it is sideways, and if it is rotated 90 degrees, then it becomes vertical
hope this helps, and sorry if im wrong
        
             
        
        
        
Answer:
1. ΔXYZ is a right Δ with altitude YU.
Given
2. ΔXYZ ~ ΔYUZ
Right Triangle Altitude Similarity Theorem
3. VW || XY
Given
4. ∠VWZ ≅ ∠XYZ
Corresponding angles
5. ∠Z ≅ ∠Z
Reflexive property of congruence
6. ΔXYZ ~ ΔVWZ
AA Similarity postulate
7. ΔYUZ ~ ΔVWZ
Transitive property of similar triangles
Step-by-step explanation:
The first statement is given in the problem.  Since we know the altitude of a right triangle, we can use the Right Triangle Altitude Similarity Theorem to say that the triangles formed by the altitude are similar to each other and the original triangle.
Next, we are given in the problem statement that the lines VW and XY are parallel.  Therefore, ∠VWZ and ∠XYZ are corresponding angles, which makes them congruent.  And since ∠Z is equal to itself (by reflexive property), we can use AA similarity to say ΔXYZ and ΔVWZ are similar.
Finally, combining statements 2 and 6, we can use transitive property to say that ΔYUZ and ΔVWZ are similar.
 
        
             
        
        
        
There's nothing to solve ._.
        
             
        
        
        
I'll denote the identity function by  . Then for any functions
. Then for any functions  with inverse
 with inverse  ,
,

One important fact is that composition is associative, meaning for functions  , we have
, we have

So given

we can compose the functions on either side with  :
:

then apply the rules listed above:
