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3. I need help with a Venn Diagram problem.

I can help you with the problem, but I'd like to first ask what progress you've made so far. If you're stuck at a certain point, then I can help you specifically for that point. If you could give m...

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2. Classroom Tips and Tricks
3. Share your tips on how I can plan and assign math lessons to students

Great question! Personally, I had to make sure my sibling was practicing exercises on Khan Academy, and had many of the same questions as you.  In terms of the points workaround, and making sure a ...

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3. Vectors in precalculus

You need to know about vectors to study higher areas of mathematics, such as linear algebra and even vector calculus, both of which are steps you might take during or after studying calculus. 

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3. Sinusoidal word problems

Usually in sinusoidal word problems, either both of the answers are correct, or one of the answers is correct because of the context of the problem. For example, let's say in your problem, the grap...

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3. Subtracting Negative numvers in Khan Academy world of math

When dealing with adding or subtracting negative numbers, I always think of a number line. For this question, picture the number line starting at -2. Now, you are trying to subtract a negative num...

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3. Derivatives of inverse trig functions sec^-1(x) and csc^-1(x)

Just to clarify what you are asking, when you say you want the derivatives of sec^-1(x) and csc^-1(x), do you mean arcsec(x) and arccsc(x), or the reciprocals of secant and cosecant? Because sec^-1...

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3. molecular orbital theory

The bond order is needed to calculate the strength of the bond, and it relies on the concept of bonding and antibonding orbitals. We need to create the schematic representation with its bonding and...

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3. Requesting a Video About Creating a Cross Section of 3D Figure

Hi! About your question concerning the cross sections of 3D shapes, is there any question or exercise that you are having difficulty with? I can help you with understanding it or clearing any confu...

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3. Does Khan Academy have content about Unit Rates from Tables?

Hi!  I found a video and an article that might suit what you're looking for:  https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-visualize-ratios/v/solving-ratio-prob...

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3. Chemistry -chemical formula and equations

Here's how you would go through such a combustion analysis question: The combustion is centered around this reaction: CxHy + O2 --> CO2 + H2O Using the molar mass of CO2, find the percentage of car...