Sarah already had 45 stamps in her collection and she gets 7 new stamps each month how long will it take before she has 129 stamps in her collection ?

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

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

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !