There are 30 students. 8 students have cats, 15 students have dogs, and 5 students have both a cat and a dog. how many students don't have a cat or a dog?

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)