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Mathematics, 15.12.2020 14:00 KittyLoverCat
9) A 5 inch by 7 inch picture has a frame surrounding
it on all four sides of width w. The total area of the
picture frame and picture is 80 square inches.
a) Using the diagram and information, write an
expression for the total length, including the
frame, and with an expression for the total
width, including the frame.
Length expression:
Width expression:
b) Using the expressions for total length and width, write an equation for the total
area of the rectangular picture and frame (Hint: Area = l ร w).
c) Using your knowledge of factoring, solve the equation from (b) for the width of
the frame surrounding the picture.
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9) A 5 inch by 7 inch picture has a frame surrounding
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