Algebra II : Algebra II

Study concepts, example questions & explanations for Algebra II

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Example Questions

Example Question #3 : Solving Inequalities

Solve the inequality:

Possible Answers:

Correct answer:

Explanation:

Example Question #5 : Solving Inequalities

Solve the following inequality for :

Possible Answers:

Correct answer:

Explanation:

Most of solving inequalities is straightforward algebra and we can manipulate them in the same way as equations in most cases. 

However, we must remember that when multiplying or dividing by negative numbers in inequalities, we have to switch the direction of the inequality. So we do the final division step and get the answer:

Example Question #3 : Solving Inequalities

Solve for :

Possible Answers:

Correct answer:

Explanation:

In order to solve this inequality, we must first consolidate all of our values on one side.

The first thing we need to do is move the  to the other side:

This results in:

Next, we need to move the  from the right side over to the left side:

This gives us

Dividing each side by  gives us our solution:

Example Question #7 : Solving Inequalities

What are the possible values of  if  and  ?

Possible Answers:

Correct answer:

Explanation:

The two equations should be solved separately to get,

  and

.

This can be checked by plugging in values between  and  and seeing if they satisfy both equations.

Example Question #1 : Writing Inequalities

Find the solution set of the inequality:

Possible Answers:

Correct answer:

Explanation:

or, in interval notation, 

Example Question #1 : Writing Inequalities

Solve for :

Possible Answers:

Correct answer:

Explanation:

The first step is to distribute (multiply) through the parentheses:

Then subtract  from both sides of the inequality:

Next, subtract the 12:

Finally, divide by two:

Example Question #3 : Graphing Inequalities

Axes_2

 

Which of the following inequalities is graphed above?

Possible Answers:

Correct answer:

Explanation:

First, we determine the equation of the boundary line. This line includes points  and  , so the slope can be calculated as follows:

Since we also know the -intercept is , we can substitute  in the slope-intercept form to obtain equation of the boundary:

The boundary is included, as is indicated by the line being solid, so the equality symbol is replaced by either  or . To find out which one, we can test a point in the solution set - for ease, we will choose :

 _____   

  _____ 

  _____ 

0 is less than 7 so the correct symbol is 

The correct choice is .

Example Question #2081 : Algebra Ii

Solve for .

Possible Answers:

Correct answer:

Explanation:

First, add 2 to both sides of the inequality:

 and simplify: .

Then, multiply each side by 3: 

 and simplify: 

Example Question #242 : Algebra Ii

Solve for :

Possible Answers:

Correct answer:

Explanation:

Inequalities can be treated like any other equation except when multiplying and dividing by negative numbers. When multiplying or dividing by negative numbers, we just flip the sign of the inequality so that  becomes , and vice versa.

Example Question #13 : Solving Inequalities

Find the solution set of the following inequality.

Possible Answers:

Correct answer:

Explanation:

To make this problem easier to solve, we can add 2 to both sides so that we can factor the left side of the expression.

The breakpoints to examine are at 

These two breakpoints create 3 total regions that we need to examine:

, and . Which ever region satisfies the expression above will be a solution to the inequality.

A value of -3 gives us: .

 is greater than 0, so it satisfies the inequality.

A value of -1.5 for the second region does not satisfy the inequality.

A value of 0 for the third region does satify the inequality, so the first and third regions give us our answer.

.

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