Please help me I appreciate if u helped out

Answer:
[tex] BD = 56 [/tex]
Step-by-step explanation:
BD = ??
CB = 17
CD = 73
Thus:
[tex] CB + BD = CD [/tex] (segment addition postulate)
[tex] 17 + BD = 73 [/tex] (substitution)
[tex] BD = 73 - 17 [/tex] (subtraction property of equality)
[tex] BD = 56 [/tex]