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# Tutor profile: Ethan M.

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Ethan M.
Pre-Med Biology and Computer Science student at University of Illinois Urbana-Champaign
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## Questions

### Subject:Geometry

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Question:

What is the perimeter of the square if the area of the square is 900 square mm?

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Ethan M.

We know that the area of a square is s^2 with s being the length of one side of the square. So we can find the length of the side by taking the square root of the area. After taking the square root of 900 we find s to equal 30 . We know that every side is equal on a square so the perimeter is 4s. Multiplying 4 times 30 gives us 120 which is the answer to the problem.

### Subject:Study Skills

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Question:

For which class would flashcards be better used for? Biology or Geometry?

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Ethan M.

Flashcards are best suited for classes that are more conceptual based and have concepts or terms you need to memorize. Therefore they would be better used for biology since there are many molecules and concepts that need to be memorized. Geometry on the other hand is more application based,

### Subject:Algebra

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Question:

Let's say there is an unknown number. After this number is multiplied by 4 and increased by 3, the answer is 63. What is the value of the unknown number?

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Ethan M.

This problem can be solved by creating an algebraic equation. We can have the unknown number = X. We also know the number is first multiplied by 4 (so our equation starts with 4 times x or 4x) and then is increased by 3( so 4x + 3) and it equals 63. Our overall equation would then be 4x + 3 = 63. Our next task is to isolate X by itself. Using inverse operations, we subtract 3 from both sides to get 4x = 60, then divide by 4 on both sides to get a final answer of X = 15 meaning 15 is our unknown number.

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