15 tickets cost $193.75 what is the average cost of each ticket

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building