Sally went to the store and purchased 4 skirts, 4 dresses and 5 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 6 shirts. Each skirt costs $10, each dress cost $15, and each shirt costs $16. 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 4 skirts, 4 dresses and 5 shirts. Anna went to the store and purchased 3 skirts, 3 dresses and 6 shirts. Each skirt costs $10, each dress cost $15, and each shirt costs $16. 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.

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter6: Matrices And Determinants

Section: Chapter Questions

Problem 4T

See similar textbooks

Similar questions

Explain the difference between the row-echelon form and the reduced row-echelon form of a matrix.
Decide whether each statement is true or false. If false, tell why. [35281140] is a 42 matrix.
Solve for a11, a12, a21 and a22 in the matrix equation a11a12a21a22=6324.
Solve for x and y in the matrix equation 2AB=I, given A=[1123] and B=[x2y5].
For the matrices below, find (a) AB, (b) 3A and (c) 3A2B. A=410438 and B=041317