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The area of a rectangle of length x is given by 3x^2 + 5x. How do you find the width of the rectangle?

Answer 1

Julia Adams

#"Width" = 3x + 5#

Since for a rectangle,

#"Area" = "Length" xx "Width"#

Dividing by #"Length"# throughout,

#"Width" = frac{"Area"}{"Length"}#

#= frac{3x^2 + 5x}{x}#

#= 3x + 5#

That's it! But do note that in some places, the definition of the length of a rectangle forbids it to be shorter than the breadth of the same rectangle.

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Answer 2

Abigail Allen

To find the width of the rectangle, divide the area formula (3x^2 + 5x) by the length (x). So, the width would be the area formula (3x^2 + 5x) divided by the length (x).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.