Yvette encoded a secret phrase using matrix multiplication. Using A= 1, B = 2, C = 3, and so on, she multiplied the clear text 15

2

code for each letter by the matrix C-

to get a matrix that represents the encoded text. The matrix representing the

12 11

What

ecret phrase? Determine the location of spaces after you

48 73114 30 136 78 35

encoded text is

21 32 50 13 58 35

decode the text.

O FIND THE PRODUCT

O FIND THE INVERSE

FINE IS THE PIANO

FINE IS A WARM DAY