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Tutor profile: Alexandra L.

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Alexandra L.
Seasoned tutor with experience in many subjects
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Questions

Subject: Basic Chemistry

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Question:

Water-based liquids can be described as acidic, neutral, or basic, with respect to pH. Which of these describes milk?

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Alexandra L.
Answer:

Milk is nearly neutral pH but slightly acidic due to the lactic acid it contains.

Subject: Biology

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Question:

Sea stars have a unique trait that allows them to autotomize one or more arms under physical disturbance. __________________ is a form of asexual reproduction and allows them to regenerate their limb.

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Alexandra L.
Answer:

Regeneration

Subject: Algebra

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Question:

Solve the following binomial: (x+4)(x-4)

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Alexandra L.
Answer:

x^2 - 16 Using the FOIL method, you first multiple the front values in each of the parentheses (x*x)=x^2 Then the outer values (-4x), then the inner values (+4x). Finally the last numbers: +4*-4=-16 Now place all the values in an equation: x^2 + -4x + 4x -16 Simplify: x^2 -16

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