Carlos has 32 envelopes and wants to deliver 3 envelopes to each class. How many classrooms will he visit?

10 classrooms

With 2 left over.

It's a simple question, make sure that you know that the key is 32/3, and because it's not fully divisible use the whole number (10)

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