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# Tutor profile: Sara N.

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Sara N.
Math/Social Studies Teacher
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## Questions

### Subject:Pre-Algebra

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Question:

What number is 75% of 200?

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Sara N.

When dealing with percentages it is very important to know what "is", "what number", and "of" means. In percent problems "is" means equal. In percent problems "of" means to multiply. In percent problems "what number" just means to add a variable. So looking at our problem we can set up an equation. What number (x) is (=) 75% of (*) 200 When put altogether it looks like x = 75% * 200 Then solve. 75% times 200 equals 150. So x = 150. Check and make sure your answer makes sense. 75% is a little less than 100% 100% is equal to 200 So it would make sense to get 150 as your answer because it is a little less than 200.

### Subject:Basic Math

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Question:

Mike has 200 dollars in his piggy bank. He received from his birthday a total amount of 250 dollars and added this money to his piggy bank. How much money does he have in his piggy bank after his birthday?

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Sara N.

### Subject:Algebra

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Question:

Solve for x (keep in simpilist form) : -5 - ( x + 3 ) = 5x

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Sara N.

To solve for "x" you first have to get "rid" of the parentheses around x + 3. Since there is a negative sign in front, you have to apply that negative to every term inside the parentheses. You would then have 5 - x - 3 = 5x Then combine like terms. 5 - 3 = 2 Then you would get: 2 - x = 5x Next, we can move our -x to the other side to be "friends" with its like term. Since it is a negative x we have to do the opposite and add it to the other side making it: 2 = 6x Since the 6x represents multiplication, to undo multiplication you have to divide. You'd divide 2 by 6 to get 1/3 = x

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