SOLUTION: A picture 11 inches by 15 inches is to be mounted on a piece of mat board so that there is an even amount of mat all around the picture. How wide will the border be if the area of
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-> SOLUTION: A picture 11 inches by 15 inches is to be mounted on a piece of mat board so that there is an even amount of mat all around the picture. How wide will the border be if the area of
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Question 251321: A picture 11 inches by 15 inches is to be mounted on a piece of mat board so that there is an even amount of mat all around the picture. How wide will the border be if the area of the mounted picture is 285 square inches? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! (11+x)*(15+x)=285
x^2+26x+165 = 285
x^2+26x-120= 0
(x-4)(x+30)=0
We can only use positive answers
