I was a little confused on this problem but I think I got it right. Can someone please check to make sure? I really need to get this correct.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −