A15-ounce alloy containing 30% gold was
mixed with an alloy containing 5% gold to
get an alloy containing 20% gold. how
many ounces of the 5% alloy were used?

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

my answer got deleted but it's a

step-by-step explanation:

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation: