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Sally went to the store and purchased 3 skirts, 4 dresses and 6 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 3 shirts. Each skirt costs $29, each dress cost $26, and each shirt costs $9. a) Write a 2 x 3 matrix summarizing the purchases made by Sally and Anna. (Keep the order of information). b) Write a 3 x 1 matrix summarizing the cost (in dollars) of the items. (Keep the order of information). c) Use matrix multiplication to find a 2 x 1 matrix summarizing the total amount (in dollars) spent by Sally and Anna.

Sally went to the store and purchased 3 skirts, 4 dresses and 6 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 3 shirts. Each skirt costs $29, each dress cost $26, and each shirt costs $9. a) Write a 2 x 3 matrix summarizing the purchases made by Sally and Anna. (Keep the order of information). b) Write a 3 x 1 matrix summarizing the cost (in dollars) of the items. (Keep the order of information). c) Use matrix multiplication to find a 2 x 1 matrix summarizing the total amount (in dollars) spent by Sally and Anna.

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.1: Matrix Operations
Problem 19EQ: A factory manufactures three products (doohickies, gizmos, and widgets) and ships them to two...
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Sally went to the store and purchased 3 skirts, 4 dresses and 6 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 3 shirts. Each skirt costs $29, each dress cost $26, and each shirt costs $9. a) Write a 2 x 3 matrix summarizing the purchases made by Sally and Anna. (Keep the order of information). b) Write a 3 x 1 matrix summarizing the cost (in dollars) of the items. (Keep the order of information). c) Use matrix multiplication to find a 2 × 1 matrix summarizing the total amount (in dollars) spent by Sally and Anna.
Transcribed Image Text:Sally went to the store and purchased 3 skirts, 4 dresses and 6 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 3 shirts. Each skirt costs $29, each dress cost $26, and each shirt costs $9. a) Write a 2 x 3 matrix summarizing the purchases made by Sally and Anna. (Keep the order of information). b) Write a 3 x 1 matrix summarizing the cost (in dollars) of the items. (Keep the order of information). c) Use matrix multiplication to find a 2 × 1 matrix summarizing the total amount (in dollars) spent by Sally and Anna.
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