PLEASE I NEED HELP ITS DUE SOON

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?