fish tank's design specifies a length that is 8inches longer than the width. Height of the tank is to be 5inches longer than the width. Let w represent the width and write expression for the volume of the tank in terms of w.
(8+w)(5+w)
40+8w+5w+w^2
my answer is: w^2+13w+40
is that right?

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Seems volume involves a cube as volume will be in cubic inches.

Hey you didn't use the width for width

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