Which is the same as multiplying a number by 2?
a)subtracting a number from itself
b)adding 2 to a number
c)adding a number to itself
d)multiply a number by itself

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

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