What is the probability that the collection will include at least one group from the United states? At least 2 from the United sates? That all 5 will be from the United states?

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

What is the standard form of -5x^2+2x^4-11+x^3+3x

What is the area of the trapezoid shown ?