Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 12 - Data Analysis and Probability - 12-1 Organizing Data Using Matrices - Practice and Problem-Solving Exercises: 27

Answer

$\quad \begin{bmatrix} -28.2 & 30.1 & -20.9 \\ 7.9 & 27.9 & -37 \\ -8 & -36.4 & 7.8 \end{bmatrix}$

Work Step by Step

Multiply each element of the first matrix by -3. $\quad \begin{bmatrix} -12.6 & 21.9 & -2.1 \\ -8.1 & 27.9 & -35.4 \\ -10.8 & -24.6 & 14.4 \end{bmatrix}$ Multiply each element of the second matrix by 2. $\quad \begin{bmatrix} 15.6 & -8.2 & 18.8 \\ -16 & 0 & 1.6 \\ -2.8 & 11.8 & 6.6 \end{bmatrix}$ Subtract the second matrix from the first matrix. $\quad \begin{bmatrix} -12.6 & 21.9 & -2.1 \\ -8.1 & 27.9 & -35.4 \\ -10.8 & -24.6 & 14.4 \end{bmatrix} - \quad \begin{bmatrix} 15.6 & -8.2 & 18.8 \\ -16 & 0 & 1.6 \\ -2.8 & 11.8 & 6.6 \end{bmatrix}$ Result: $\quad \begin{bmatrix} -28.2 & 30.1 & -20.9 \\ 7.9 & 27.9 & -37 \\ -8 & -36.4 & 7.8 \end{bmatrix}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.