What is bd ?

Borderline personality disorder

Step-by-step explanation:

A mental disorder characterized by unstable moods, behavior, and relationships.

The cause of borderline personality disorder isn't well understood. Diagnosis is made based on symptoms.

Symptoms include emotional instability, feelings of worthlessness, insecurity, impulsivity, and impaired social relationships.

Treatments include talk therapy or, in some cases, medications. Hospitalization helps if symptoms are severe.

b

step-by-step explanation:

answer: 1) twenty-seven times y

              2) twenty-seven multiplied by y