Ralph is building a greenhouse lo grow tomatoes during the winter for sale as shown in the ligure. He plans to cover the top and the two sides with glass. For ease of access, he plans to cover the front and back with plastic sheets. The glass costs $225 per square yard.

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

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

idek

step-by-step explanation: