College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 8 - Section 8.2 - Systems of Linear Equations: Matrices - 8.2 Assess Your Understanding - Page 570: 11

Answer

$[A|B]=\left[\begin{array}{rr|r} { 0.01 }&{-0.03 } &{ 0.06 }\\ { 0.13 }&{ 0.10 } &{ 0.20 }\end{array}\right]$

Work Step by Step

Standard form of a linear equation: $a_{i1}x_{1}+a_{i2}x_{2}+\cdots+a_{in}x_{n}=b_{i}$ ... the index i indicates that it is the i-th equation of a system of equations. Augmented matrix $[A|B]$ of a system written in standard form: - has as many rows as there are equations, - has one more column than there are variables, - has the constants of the RHS in the last column, $B=[b_{i}]$ - has the entries of the coefficient matrix $A=[a_{ij}]$ to the left of the last column. --- The system is in standard form $ A=\left[\begin{array}{ll} 0.01 & -0.03\\ 0.13 & 0.10 \end{array}\right],\quad B=\left[\begin{array}{l} 0.06\\ 0.20 \end{array}\right]$ $[A|B]=\left[\begin{array}{rr|r} { 0.01 }&{-0.03 } &{ 0.06 }\\ { 0.13 }&{ 0.10 } &{ 0.20 }\end{array}\right]$
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