Which of these statements are true about scientific theories and laws?

Theories are untested.

Laws are untested.

Laws are often expressed as math formulas.

A law is the same as a theory.

Theories are not opinions.

The best response would be that theories are not opinions. While laws and theories are similar, laws tend to be a collection of theories about the same phenomenon. Laws can be expressed as math formulae, but more often they're in the form of "if-then" statements. Laws and theories both have to be rigorously tested before they reach these classiffications.