Awater color is 20 inches long by 9 inches wide. ramon makes a boreder around the watercolor painting by making a mat that adds 1 inch to each side of the length and the width. what is the area of the mat?

The area of the mat = total area added minus the original area of the water color painting.
length of the mat is:L = 20 in + 1 in + 1 in because 1 in  is added to each sideL = 22 inwidth of the mat is:w = 9 in + 1 in + 1inw = 11 in
Area mat = (22 in x 11 in) - ( 20 in x 9 in)
area mat = 62 sq in is the area of the mat