If a and b are dependent events, which of these conditions must be true?

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

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

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x