The tree diagram below represents the relationship between the sets and subsets of real numbers .

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.)

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers