Carla earns an 8% commission as a salesperson. She's an old dish washer that cost $400. How much commission did Carla earn?
1 answer:
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Answer:
(a)First Row, First Column =1
(b)First Row, second Column =0
(c)Second Row, First Column =0
(d)Second Row, second Column =1
Step-by-step explanation:
Given matrix
The Inverse of a 2X2 matrix
can be found using the following:
Therefore:
Next, we find the product
Therefore:
(a)First Row, First Column =1
(b)First Row, second Column =0
(c)Second Row, First Column =0
(d)Second Row, second Column =1
NOTE: The multiplication of a matrix and its inverse always gives the identity matrix as seen above,