Joe has a savings account and a credit card. he has $422 saved in his savings account and has purchased $484 worth of merchandise on his credit card. use positive and negative numbers to explain the sitiuation. is joe's overall balance represented by a positive or negative number? justify your answer.

Multiplying an even number of negative numbers gives an answer that is choose from:

Why do interests rates on loans to be lower in a weak economy than in a strong one

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."