SAT II Math II : Single-Variable Algebra

Study concepts, example questions & explanations for SAT II Math II

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Example Questions

Example Question #3 :Solving Equations

Solve the equation for y

Possible Answers:

有限公司rrect answer:

Explanation:

First subtract 27 from both sides of the equation

Add 5z to both sides of the equation

Lastly, divide both sides by 5 to get the y by itself

Example Question #4 :Solving Equations

Solve the equation:

Possible Answers:

有限公司rrect answer:

Explanation:

To isolate the x-variable, we can multiply both sides by the least common denominator.

The least common denominator is. This will eliminate the fractions.

Subtract 4 on both sides.

Divide by 24 on both sides.

The answer is:

Example Question #5 :Solving Equations

Solve the equation:

Possible Answers:

有限公司rrect answer:

Explanation:

Find the least common denominator of both sides of the equation, and multiply it on both sides.

The LCD is 60.

有限公司mbine like-terms on the left.

Divide by 5 on both sides.

The answer is:

Example Question #6 :Solving Equations

Solve the equation:

Possible Answers:

有限公司rrect answer:

Explanation:

Distribute the eight through both terms of the binomial.

Addon both sides.

Add 24 on both sides.

Divide by 9 on both sides.

The answer is:

Example Question #7 :Solving Equations

Solve the equation:

Possible Answers:

有限公司rrect answer:

Explanation:

Subtractfrom both sides.

Add 6 on both sides.

The answer is:

Example Question #8 :Solving Equations

Solve

Possible Answers:

有限公司rrect answer:

Explanation:

First, we want to get everything inside the square roots, so we distribute the:

Now we can clear our the square roots by squaring each side:

Now we can simplify by moving everything to one side of the equation:

将会给我们:

So our answers are:

Example Question #9 :Solving Equations

Solve

Possible Answers:

没有解决方案.

有限公司rrect answer:

没有解决方案.

Explanation:

Begin by gathering all the constants to one side of the equation:

Now multiply by:

And finally, square each side:

This might look all fine and dandy, but let's check our solution by plugging it in to the original equation:

So our solution is invalid, and the problem doesn't have a solution.

Example Question #11 :Single Variable Algebra

Solve the equation:

Possible Answers:

有限公司rrect answer:

Explanation:

Add two on both sides.

Divide by three on both sides.

The answer is:

Example Question #12 :Single Variable Algebra

Solve:

Possible Answers:

有限公司rrect answer:

Explanation:

To isolate the x-variable, multiply both sides by the coefficient of the x-variable.

The answer is:

Example Question #13 :Single Variable Algebra

Give the solution set of the following rational equation:

Possible Answers:

没有解决方案

有限公司rrect answer:

没有解决方案

Explanation:

Multiply both sides of the equation byto eliminate the fraction:

Subtractfrom both sides:

The only possible solution is, However, if this is substituted in the original equation, the expression at left is undefined, as seen here:

An expression with a denominator of 0 has an undefined value, so this statement is false. The equation has no solution.

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