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Rodney E.

Very helpful with math

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Pre-Algebra

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Question:

If x=2, what does y equal in y=2x?

Rodney E.

Answer:

To solve for y, you must use what you already know about the equation. It tells you x=2, so you will plug 2 in for x, which will make you equation look like this: y=2(2) Once you plug in 2 in for x, you will need to use the order of operations to solve. In this case, you will multiply 2 times 2 and you will get 4. So your final answer will be y=4

Basic Math

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Question:

What is 8 squared?

Rodney E.

Answer:

8 squared translates to 8x8. To find out the answer you will times 8 by 8, which will give you a final answer of 64.

Algebra

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Question:

if 7x+4=25, what does x equal?

Rodney E.

Answer:

To solve 7x+4=25, you must move the constant to the right. In this equation, the constant is 4. To move this constant you need to add -4 to both sides. The 4 on the left side will cancel out and add -4 to the other side will give you 21, which will end up giving you 7x=21. After this step, you will need to divide both sides by 7. After you divide both sides you will end up with x=3. To find out if this answer is correct you can insert 3 in for x into the original equation. example: 7(3)+4=25 once you insert 3 in for x, you will do the order of operations (PEMDAS). You will start at the beginning of the equation and go straight across. So you will take 7x3, which will give you 21. Then you will add 21 to 4, which will give you 25. Since 25=25, you have proved that x=3

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