On Christian's shelf are: 6 mystery books
5 science books
4 history books
3 adventure books
Christian will randomly choose 1 book to read. What is the probability he will not choose and adventure book? Answer in simplest fraction form.

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?