Answer:
A) 7
Step-by-step explanation:
Because the triangles are congruent to each other, then their corresponding angles are also congruent to each other. Thus, angles Z and V are congruent to each other:
[tex]\angle Z=\angle V\\\\40^\circ=(5n+5)^\circ\\\\35=5n\\\\7=n[/tex]
Therefore, your answer is A.