Which of the following systems of inequalities would produce the region indicated on the graph below?
4
F3
O A. VS-x+4; y > x+2; y 2 0; x 20
B. VS -x+4;y 2x+ 2; y 2 0;x20
O C. VS -x+4; y O D. V? -x+4; y

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

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."

What is the difference between the points (4, 7) and (4, -5)? a. 0 units b. 2 units c. 4 units d. 12 units