An equation that is true for every value of the variables is a(n)

Matteo makes raspberry punch. the table shows how many parts ginger ale and raspberry juice to use for a batch. raspberry punch parts ginger ale 2 parts raspberry juice 3 matteo decides to add one part of raspberry juice. what is the new ratio of ginger ale to raspberry juice?

In the diagram, gef and hef are congruent. what is the value of x

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