How are mixed numbers used in the real world

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer