For the situation in item 14 which of the following represents a possible combination of books that derek can buy

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

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