Question

Please help! Correct answer only, please! Consider the following information matrices for the price of clothing at a clothing store: Which of the following correctly describes? A. Cost of a Small Green t-shirt and a Large pair of Blue Jeans B. Cost of a Large Blue t-shirt and a Medium pair of RC Jeans C. Cost of a Small Green t-shirt and a Medium pair of RC Jeans D. Cost of a Large Blue t-shirt and a Large pair of Blue Jeans

Answer 1

Answer: b) Large blue t-shirt & Medium RC jeans

Step-by-step explanation:

The subscript numbers attached to the matrix letter represents the:

ROW, COLUMN

$A=\left[\begin{array}{ccc}a_{1,1}&a_{1, 2}&a_{1, 3}\\a_{2,1}&a_{2, 2}&a_{2, 3}\\a_{3,1}&a_{3, 2}&a_{3, 3}\end{array}\right] \qquad B=\left[\begin{array}{ccc}a_{1,1}&b_{1, 2}&b_{1, 3}\\b_{2,1}&b_{2, 2}&b_{2, 3}\\b_{3,1}&b_{3, 2}&b_{3, 3}\end{array}\right]$

A₁,₃ = 1st row, 3rd column

         1st row is Blue, 3rd column is Large

B₃,₂ = 3rd row, 2nd column

         3rd row is RC jeans, 2nd column is Medium

A₁,₃ + B₃,₂ = Large blue t-shirt & Medium RC jeans