1.   Solve the system of equations algebraically.
x - y + 2 = 0
x2 + y2 = 10
    A. (4, 6) B. (1, 3)
    C. (-1, -3), (3, 1) D. (-3, -1), (1, 3)
    Hint

  2.   Solve the system of equations algebraically.
x2 - y2 = 12
x2 + 2y2 = 24
    A. (2, 4), (-2, -4) B. (4, 2), (-4, -2)
    C. no solution D. (±4, 2), (±4, -2)
    Hint

  3.   Graph the system of inequalities and .
    A. B.
    C. D.
    Hint

  4.   Graph the system of inequalities and .
    A. B.
    C. D.
    Hint

  5.   Which set of inequalities represents the graph?
   
    A. x2 + y2 3;
x y + 1
B. x2 + y2 9;
y x + 1
    C. x2 + y2 9;
y x + 1
D. x2 + y2 3;
y x + 1
    Hint