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Calculus answers

Hi, I have used Khan Academy for years and love the site. I also use Delta Math. I find that when I click the hints on Khan Academy it is so confusing since a lot of it is text based which I don't ...

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Mixtures and combined rates word problems

Dear Khan Academy, I love your site and have used it for the past few years to get confident at math. I cannot work out the problems in Precalculus unit 4 Modeling with rational functions. I feel l...

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Scribble tool

I am doing a geometry question and making use of the scribble tool to find area. I suggest that there should also be a polygon tool that snaps to gridlines.

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