17. Jimothy and Kofi went to the store. They both started and ended with the same amount of money. Jimothy spent $14 on soup, bought 7 loaves of bread, and gave a homeless man $5. Kofi bought 2 loves of bread, lost a
twenty-dollar bill, and bought $4 worth of gum. How much did a loaf of bread cost

Step-by-step explanation:

14+5=19

4+15=19

15\2=7.1

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