These are the first sentences in the short story, "the gift of the magi," by o. henry: "one dollar and eighty-seven cents. that was all. and sixty cents of it was in pennies." what are possible numbers of coins to make $1.87? use the equation that represents the value of the coins to complete the table. q quarters d dimes n nickels p pennies 4 6 5 0 18 0 2 5 22 10 37 5 0 47

Each row is read from left to right not down, that's what messed me up. All it wants you to do is fill in the blanks to make each row equal 187. It's a tricky table. q+d+n+p = 187. q=25, d=10, n=5, p=1. So for the first row, it's 4q + 6d + 5n + 2p = 187.

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