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Algebra 1 : Variables

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Example Questions

Example Question #4711 : Algebra 1

Evaluate: $3x^3 \div 6x$

Possible Answers:

$\frac{1}{2}x$

$\frac{1}{2}x^2$

2x^2

Correct answer:

$\frac{1}{2}x^2$

Explanation:

First, divide the coefficients.

$3\div 6 = \frac{1}{2}$ .

Now consider the variables. x^3 means x times itself 3 times. Doing $x^3 \div x$ is the same as $\frac{x*x*x}{x}$ .

We see that an x from the top can cancel with the x on the bottom, leaving $\frac{x*x}{1}$ , or x^2 . Our answer then is $\frac{1}{2}x^2$ .

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Example Question #481 : Variables

Divide: $\frac{x^2}{x^{-1}}$

Possible Answers:

x^3

$\frac{1}{x^3}$

-x^3

$\frac{1}{x}$

Correct answer:

x^3

Explanation:

Dividing exponents by the same base allows the powers to be subtracted. Rewrite the exponents as one base.

$\frac{x^2}{x^{-1}} = x^{2-(-1)} = x^3$

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Example Question #13 : How To Divide Monomial Quotients

Find the result of

$\frac{12x^3\cdot2x^4}{3x^5}$ .

Possible Answers:

12x^3

$24x^{12}$

8x^2

$8x^{7/5}$

Correct answer:

8x^2

Explanation:

The question asks for the quotient of $\frac{12x^3\cdot2x^4}{3x^5}$ .

We can rewrite the expression using the rules of multiplication and exponents to find the answer of 8x^2 .

$\frac{12\cdot2\cdot x\cdotx^{3+4}}{3x^5}= \frac{24}{3}\cdot x^{3+4-5}= 8x^2$

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Example Question #482 : Variables

Divide: $\frac{x}{x^3}$

Possible Answers:

$\frac{1}{2x}$

$x^{2}$

$\frac{1}x{}$

$\frac{1}{x^2}$

Correct answer:

$\frac{1}{x^2}$

Explanation:

Notice that both bases are the same. The power of the base in the numerator is one.

Since the bases are divided, simply subtract the powers.

$\frac{x}{x^3} = \frac{x^1}{x^3} = x^{1-3} = x^{-2}= \frac{1}{x^2}$

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Example Question #483 : Variables

Divide the following monomial quotients:

$\frac{6x^{2}}{2x}$

Possible Answers:

$12x^{3}$

12x

$3x^{2}$

Correct answer:

Explanation:

To solve this problem, split it into two steps:

1. Divide the coefficients

$\frac{6}{2}=3$

2. Divide the variables. We also need to remember the following laws of exponents rule: When dividing variables, subtract the exponents.

$\frac{x^{2}}{x} =x^{2-1}=x$

Combine these to get the final answer:

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Example Question #17 : How To Divide Monomial Quotients

Divide the following monomial quotients:

$\frac{10x^{4}y}{5xy}$

Possible Answers:

$2x^{3}$

$2x^{3}y$

$x^{2}$

2xy

Correct answer:

$2x^{3}$

Explanation:

To solve this problem, split it into two steps:

1. Divide the coefficients

$\frac{10}{5}=2$

2. Divide the variables. We also need to remember the following laws of exponents rule: When dividing variables, subtract the exponents.

$\frac{x^{4}}{x} =x^{4-1}=x^{3}$

$\frac{y}{y}=1$

Combine these to get the final answer:

$2x^{3}$

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Example Question #484 : Variables

Divide the following monomial quotients:

$\frac{xy^{2}}{x^{2}y}$

Possible Answers:

$\frac{y}{x}$

$\frac{x}{y}$

$\frac{1}{x}$

Correct answer:

$\frac{y}{x}$

Explanation:

To solve this problem, divide the variables. We also need to remember the following laws of exponents rule: When dividing variables, subtract the exponents.

$\frac{x}{x^{2}} =x^{1-2}=x^{-1}=\frac{1}{x}$

$\frac{y^{2}}{y}=y^{2-1}=y$

Combine these to get the final answer:

$\frac{y}{x}$

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Example Question #21 : How To Divide Monomial Quotients

Divide the following monomial quotients:

$\frac{12y^{3}}{2}$

Possible Answers:

$6y^{3}$

$24y^{3}$

$2y^{3}$

$6x^{3}$

Correct answer:

$6y^{3}$

Explanation:

To solve this problem, split it into two steps:

1. Divide the coefficients

$\frac{12}{2}=6$

2. Combine this with the lone variable to get the final answer:

$6y^{3}$

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Example Question #22 : How To Divide Monomial Quotients

Divide the folloiwng monomial quotients:

$\frac{36x^{2}y^{3}}{12xy}$

Possible Answers:

$3xy^{2}$

4xy

$3x^{2}y^{2}$

$6x^{3}y$

Correct answer:

$3xy^{2}$

Explanation:

To solve this problem, split it into two steps:

1. Divide the coefficients

$\frac{36}{12}=3$

2. Divide the variables. We also need to remember the following laws of exponents rule: When dividing variables, subtract the exponents.

$\frac{x^{2}}{x} =x^{2-1}=x$

$\frac{y^{3}}{y}=y^{2}$

Combine these to get the final answer:

$3xy^{2}$

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Example Question #4721 : Algebra 1

Divide the following monomial quotients:

$\frac{25xy^{2}}{5y}$

Possible Answers:

5xy

$5x^{2}y$

Correct answer:

5xy

Explanation:

To solve this problem, split it into two steps:

1. Divide the coefficients

$\frac{25}{5}=5$

2. Divide the variables. We also need to remember the following laws of exponents rule: When dividing variables, subtract the exponents.

$\frac{x}{1} =x^{1}=x$

$\frac{y^{2}}{y}=y$

Combine these to get the final answer:

5xy

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Algebra 1 : Variables

Study concepts, example questions & explanations for Algebra 1

All Algebra 1 Resources

Example Questions

Example Question #4711 : Algebra 1

Example Question #481 : Variables

Example Question #13 : How To Divide Monomial Quotients

Example Question #482 : Variables

Example Question #483 : Variables

Example Question #17 : How To Divide Monomial Quotients

Example Question #484 : Variables

Example Question #21 : How To Divide Monomial Quotients

Example Question #22 : How To Divide Monomial Quotients

Example Question #4721 : Algebra 1

All Algebra 1 Resources

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