I am struggling with both questions please help.

Step-by-step explanation:
xbc = 55
because corresponding angle of parallel lines are equal
BXC = 70
because triangle XBC is Isosceles triangle
angle B = angle C
B = C = 55
so angle
BXC = 180 - 55 - 55
BXC = 180 - 110
BXC = 70