Use a Graphing Calculator and the Method of Matrix Inverses

Multiple Choice

Use a graphing calculator and the method of matrix inverses to Give five decimal places, if necessary.
-A bakery sells three types of cakes, each requiring the amount of ingredients shown.


To fill its orders for these cakes, the bakery used 72 cups of flour, 48 cups of sugar, and 53 eggs. How many cakes of each type were made?

A) 39 Cake I; 8 Cake II; 12 Cake III
B) 15 Cake I; 8 Cake II; 5 Cake III
C) 17 Cake I; 8 Cake II; 5 Cake III
D) 5 Cake I; 8 Cake II; 15 Cake III