### Home > PC3 > Chapter 9 > Lesson 9.1.1 > Problem 9-8

Shola’s Bakery uses sugar, eggs, and butter in all of its cakes, as well as in the frosting. Matrix shows how many eggs, cups of sugar, and ounces of butter are used in each angel food cake and in each devil’s food cake. Matrix

*shows how many eggs, cups of sugar, and ounces of butter are used in the frosting for each cake.*

e s b | ||

af |

Write the matrix

being sure to label the rows and columns, and explain what it represents.Write the matrix

with labels, and explain what it represents.,

e s b | ||

af |

Leora orders three angel food cakes and two devil’s food cakes both without frosting, as represented by the matrix

at right. Use matrix multiplication to write a matrix that shows how much sugar, eggs, and butter Shola will need to fill Leora’s order. Show all of your work.Compute

.

af df | |