SOLUTION: A border to surround a picture is to be cut from an 11 1/2 in. by 11 1/2 in. mat board. If the picture is 8 3/4 in. by 8 3/4 in., what is the width of the border?

Question 1146705: A border to surround a picture is to be cut from an 11 1/2 in. by 11 1/2 in. mat board. If the picture is 8 3/4 in. by 8 3/4 in., what is the width of the border?
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

The border is on all 4 sides and is presumably of equal width everywhere. So each dimension of the mat board is the dimension of the picture plus the width of the border twice. So the width of the border is half the difference between the width of the picture and the width of the mat board.

width = (1/2)(11 1/2 - 8 3/4)

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