Given the right triangles abc and abd, what is the length of segment bc, in units?

Abcd is a parallelogram find the valuse of x

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

When you answer this can you explain