Alarge pizza at little italy costs $7.00 plus $0.80 for each topping. the cost of a large cheese pizza at spinato's is $7.60 plus $0.70 for each topping. how many toppings need to be added to a large cheese pizza to make the costs of the pizza be the same?

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

tube or goog would be a great resource to with that question