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The matrix does not have an inverse

An eigenvector of the matrix is

The price, in dollars, of a washing machine and a clothes dryer at two different bulk stores A and B is given in the matrix below.

Store A reduces its prices by 10% and store B reduces its prices by 20%.

The new price matrix could be given by

The number of business owners and their employees attending the morning, afternoon and evening sessions of a short course are shown in the table below.

The total number of people attending the morning session, the total number attending the afternoon session and the total number attending the evening session can be found by calculating

A customer purchases 6 jumpers and 10 scarves for $512 at a merchandise store.

His friend purchases 7 jumpers and 12 scarves for $602.

If each jumper costs $ j and each scarf costs $s, then the matrix can be found by evaluating

Which of these matrices is singular?

The determinant is

The Eigenvalues of are 

is called a