How are equivalent fractions used in writing a sum of two like fractions in simplest form?

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

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.

What is the solution to the division problem below x3+x2-11x+4/x+4