Nico had 312 yards of fabric.

He used 23 yard to make a pillow cover and 13 yard to make a scarf.

How much fabric does Nico have left?

276

Step-by-step explanation:

23 plus 13 is 36 which minus 312 equals up to 276

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