Factor 20y2 + 40y + 20.
a) (2y + 4)(10y + 5)
b) (4y + 4)(5y + 5)
c) (5y + 4)(4y + 5)
d) (10y + 4)(2y + 5)

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."

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17 in long 1.3 ft wide and 8in high what is the volume