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# Tutor profile: Angel X.

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Angel X.
Math and Violin tutor
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## Questions

### Subject:Mandarin

TutorMe
Question:

Teacher, what's the difference between “你” and "您"?

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Angel X.

They both mean "you", but the difference is that 你 is used in a informal tone, whereas 您 is used for formal situations. You should always use "您" in a professional setting or speaking with elderly. For example, if you want to say "how are you" to a senior, it is polite to say “您好吗？"

### Subject:Music

TutorMe
Question:

(since I would be tutoring students on how to play the violin, a student would probably have a question like this) Student: how come I could never keep my bow steady, it always shakes and just slides across the strings.

Inactive
Angel X.

There are different ways to practice to help solve that problem. A good way to practice for me is to play a scale in full separate bows in a very slow tempo. While you play the scale, watch the way your bow moves and make sure it stays in the center between the fingerboard and the bridge. This way you will be able to improve your bow stability to prevent it from sliding. It also improves your tone when you play.

### Subject:Differential Equations

TutorMe
Question:

I see here that the dy/dx is written next to this expression, what does it mean? Why isn't there a prime sign instead of dy/dx?

Inactive
Angel X.

Well, there are different ways to express an differential equation/expression. The dy/dx means that the function y is to be differentiated with respect to x. It means the same thing as y prime.

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