1.   Find the value of .
    A. 28 B. -28
    C. -24 D. 24
    Hint

  2.   Find the inverse of .
    A. B.
    C. D.
    Hint

  3.   Find the value of the determinant .
    A. -29 B. -25
    C. -3 D. -43
    Hint

  4.   Set up a matrix equation for this chemistry problem. How many liters of 0.25 solution and 0.40 solution should be combined to make 10 liters of 0.35 solution?
    A. B.
    C. D.
    Hint

  5.   Solve this problem using matrix equations.How many liters of 0.25 solution and 0.40 solution should be combined to make 10 liters of 0.35 solution?
    A. 4.5 L of the 0.25 solution and 5.5 L of the 0.40 solution.
    B. 6.66 L of the 0.25 solution and 3.33 L of the 0.40 solution.
    C. 2.5 L of the 0.25 solution and 7.5 L of the 0.40 solution.
    D. 3.33 L of the 0.25 solution and 6.66 L of the 0.40 solution.
    Hint