Solve the following systems using matrices. Show your work and explain along the way. 1.
4x - 2y = -1
x + 5y = 1

2.
2x + 3y = 5
x + 4y = 10

Explore the matrix function on your graphing calculator.
Use your calculator to solve the following systems. Explain how you used your calculator on each
problem.

3.
4x - 2y = -1
x + 5y = 1

4.
x + 2y + 3z = -1
2x - 3y + 4z = 2
-3x + 5y - 6z = 4

Through: (-3,-3) parallel to y= 7/3x+3

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."

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180