Use the drop-down menu to determine whether each phrase describes scalar or matrix multiplication.
multiplies every element of a matrix by the same number:
requires two matrices that must be the same size:
uses both multiplication and addition to find the result:
multiplies the row of one matrix by the column of another:

1,scalar   2, neither   3,matrix    4,matrix

Step-by-step explanation:

fsfd

step-by-step explanation:

fdddff

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b