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Tutor profile: Evan Y.

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Evan Y.
Experienced math tutor
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Questions

Subject:Basic Math

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Question:

Reduce the fraction $$\frac{40}{60}$$

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Evan Y.

Since the greatest common denominator of 40 and 60 is 20, the reduced fraction is $$\frac{40/20}{60/20}$$ = $$\frac{2}{3}$$

Subject:Calculus

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Question:

Find the derivative of $$f(x) = x sin(x)$$

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Evan Y.

Use the product rule: Let a = x, b = sin(x) $$f'(x) = a'b + b'a = 1(sin(x)) + cos(x) \cdot x = sin(x) + x cos(x)$$

Subject:Algebra

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Question:

Solve for x: $$x^{2} = 4$$

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Evan Y.

Take the square root of both sides: $$x = \pm \sqrt{4} = \pm 2$$

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