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Step-by-step explanation:

Calculation is done as follows:

Number of movie posters remaining = 120 - 24 = 96

Number of band posters remaining= x  

120:100 = 96:x

x = 80  

100-x = 100 - 80 = 20

So, she should sell about 20 band posters for her to maintain the same ratio of the movie posters to the band posters.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

yes

step-by-step explanation: