I already have the answers down I just need to know how to solve each one

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

h/o/e/s mad

step-by-step explanation:

si si si

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees