A man bought 2 CD's and 3 books for $48 while shopping in the local bookstore. A woman shopping in the same store bought 4 CD's and 2
books and spent $60. Assume that each CD costs the same and also that
the cost of each book is the same. Which system of linear equations
below can be solved to find out the cost of a CD and a book? *

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.