Answer:
10
Step-by-step explanation:
y = 55/10x + 50 is the equation to represent this situation
(x-1)^2 is the factored version, so vertex is at 0, which is 1, so, A
Choice A is correct
BC=DC
the two triangles share one angel C
the two triangles each have a right angle
so they are congruent according to Angle-Side_Side Theorem
