Set A = {15, 25, 35, 65, 75} and Set B = {15, 35, 55, 75}.  Determine the elements in A ∪ B.  {55}  {15, 15, 25, 35, 45, 55, 65, 75, 75}  {15, 35, 75}  {15, 25, 35, 55, 65, 75}

Determine whether the set S={2x+x2,8+x3,x2+x3,4+x2} spans P3.

How many subsets does the set 1,3,5,...,99 have?

A family consisting of 2 parents and 3 children is to pose for a picture with 2 family members in the front and 3 in the back a. How many arrangements are possible with no restrictions? b. How many arrangements are possible if the parents must sit in the front? C. How many arrangements are possible if the parents must be next to each other?