Answer:
lo siento mucho no habló ingles
C is a vertical angle which the vertical side is corresponding to the vertical side of x°.
105°+54°+y°=180°
159°+y°=180°
y°=21°
Meaning, x=21°.
Years after 1995 = 2001-1995=6
Debt(t)=413t+5780
Debt(6)=413(6)+5780=$8258 in 2001