John Johnson

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3. Calculus: Point Continuity vs. Interval Continuity

Think of being continuous as drawing the line without ever lifting your "pencil".   A line is continuous on a closed interval if that closed interval does not have any breaks in it. The same goes f...

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3. Equivalent expression practice problem help

When a number has a subtraction sign, it will always always always denote a negative number. That is because (from what I understand) that number has the subtraction operation and it is its own thi...

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3. Understanding square roots with coefficients

Are you saying sqrt(3)^6 or (Superscript)(6)sqrt(3)? If it is the latter, then all it means is what number to the power of 6 equals ? So, x^6 =3, or in other terms, 3 (6 squared) = x.

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3. Equivalent expression practice problem help

Hi.   You are looking at the problem incorrectly. It is actually (-7) + 1 = (-6). When you see a subtraction sign infront of a number, it just means the number is negative. That subtraction sign fo...

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3. Cube roots

The cube root of a number is a number to the power of 3 that equals the number in question.   Ex. Cube root of 27? Or in other terms, x^3 = 27. So the question is asking to find x. The obvious ans...

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3. Problems in solving trigonometry questions

You shouldn't ask for the solution. You should know how to solve the problem. You will not be able to build more complex math knowledge without it. Take it from me. I wish I paid attention so that ...

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3. trigonometric identities

First, you would want to make it (sin x)^4 by trig rules. Then, it's the same as doing x^2 + x^2. It would be 2x^2. Same thing with sin. You would get 2(sin x)^4 or 2sin^4 x

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3. Uncertainty of an extrapolation - Assitance required

The uncertainty would be how much the temperature would vary. I don't know much but it seems what you would need to do is take the highest difference of the reference vs actual table and calculate ...

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3. Why does like basic algebra have videos from algebra 1 and 3 under basic algebra section?

I might have this confused but I believe linear algebra is college-level algebra. Typically taken in the second year, after calculus and such. I highly doubt you would see any linear algebra in bas...

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3. Equivalent expression practice problem help

No worries. I only understood what I explained to you in my last year of High School, so you should be fine. I'm taking Calculus II right now. Pro tip: Understand everything and don't just memorize...