10.3 Homework: multiplying matrices i

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This module provides practice problems related to multiplying matrices.

Multiply.

$\frac{1}{2} [\begin{matrix} 2 & 6 & 4 \\ 9 & n & 8 \end{matrix}]$

Multiply.

$3 [\begin{matrix} 2 & 3 & 4 \end{matrix}] [\begin{matrix} 5 \\ -6 \\ 7 \end{matrix}]$

Multiply.

$[\begin{matrix} 3 & 6 & 7 \end{matrix}] [\begin{matrix} x \\ y \\ z \end{matrix}]$

Solve for $x$ .

$2 [\begin{matrix} 7 & x & 3 \end{matrix}] [\begin{matrix} x \\ x \\ 5 \end{matrix}] = [6]$

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Source: OpenStax, Advanced algebra ii: activities and homework. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col10686/1.5

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