The question is missing the figure. So, it is attached below.
Answer:
DZ = 4 units
Step-by-step explanation:
Given:
CD || XZ
YC = 25 units, CX = 5 units, YD = 20 units.
We know that,
If CD is parallel to XZ
, then the line CD divides the sides XY and YZ of the triangle XYZ proportionally. This is true by triangle proportionality theorem.
Therefore, the lengths YC, CX, YD and DZ are in proportion. This gives,

Rewrite in terms of DZ. This gives,

Plug in
. Solve for DZ.

Therefore, the length of DZ is 4 units.
The triangles are similar, they aren't congruent (identical) though as we don't know if they share a common side
Answer:
y=2
x=3
Step-by-step explanation:
make x - y = 1 into x= y + 1
put that wherever x is in the other equation
so y + 1 + 2y =7. then combine like terms into 3y =6. then divide 6 by 3 so you get y = 2
then substitute 2 into the y in the equation x - y = 1 and you get x = 3
Answer:
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Step-by-step explanation:
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