Events a and b are overlapping. p(a) = 6/17 ; p(b) = 5/17 ; p(a and b) = 3/17 . find p(a or b). (paypal for $50 if you answer my next question after this)

Geometry. i need step by step explanation on how to do each problem.

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

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.