1.   Solve the system of equations.
    A. B.
    C. D.
    Hint
  2.   What is the solution of the system of inequalities?
   
    A. region 3 B. region 1
    C. region 2 D. region 4
    Hint
  3.   Find the value of 63.
    A. 216
    B. 18
    C. 36
    D. 729
    Hint
  4.   A baker earns 15¢ profit per glazed doughnut g, and 40¢ profit per jelly doughnut j. If a customer wants to buy no more than a dozen doughnuts and wants to try at least one of each kind, what is the maximum profit the baker can earn?
    A. $3.30 B. $4.55
    C. $4.80 D. $1.80
    Hint
  5.   The solution of a system of three linear equations in three variables, x, y, and z, is called a(n) ____ (x, y, z).
    A. integer B. ordered triple
    C. sum D. ordered pair
    Hint
  6.   Determine which ordered triple is a solution of the system of equations.
    A. (1, -2, 6) B. (-1, 2, -16)
    C. (0, 1, -14) D. (0, 0, 11)
    Hint
  7.   Which of the following systems of equations is inconsistent?
    A. 3y + 2x = 13 6y + 4x = 3
    B. y = 2x – 3 y = –3x + 4
    C. y = 7x – 2 y = –2x – 5
    D. 4y – x = 12 3y – 2x = 1
    Hint
  8.   Which of the following systems of equations is not consistent and independent?
    A. 2y + 4x = 3 7y + 5x = 18
    B. 7y + x = 9 3y + 9x = 4
    C. y + 4x = 10 6y + 24x = 60
    D. –y – 5x = 1 4y + 3x = 8
    Hint
  9.   Solve the system of equations.

–2x + 3y = 7
4x – 6y = 8.
    A. y = –22, x = 29.5 B. y = –22, x = –36.5
    C. no solution D. y = –22, x = –31
    Hint
  10.   Which of the following is always true about inequalities whose graphs do not overlap?
    A. Their slopes are opposite reciprocals. B. Each slope is negative.
    C. Their slopes are equal. D. Each slope is positive.
    Hint

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