Math
posted by Delilah .
A box with an open top is to be made by cutting 5inch squares from the corners of a rectangular piece of cardboard whose length is twice its width and then folding up the remaining flaps. Let x represent the width of the original piece of cardboard; express the volume (V) of the box as a function of x, and simplify the function.

Math 
MathMate
Width = x inches (given)
Length = 2x inches(given)
Height = 5 inches (given)
Volume = 5*x*2x = 10x² in.^{3}
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