Answer:
The entry in
is 6.3.
Explanation:
The table shows the prices of three items in a deli. The deli offers a 10% discount on weekends.
In a matrix
represents the nth element of mth row.
It is given that matrix A shows the discounted weekend rates. So the entry in
represents the discounted prize of pizza with extra cheese.
The original price of pizza with extra cheese is $7. After discount of 10%, the price of pizza with extra cheese is

The discounted prize of pizza with extra cheese is $6.3.
Therefore the entry in
is 6.3.