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Example Questions
Example Question #3 : Solving Inequalities
Solve the inequality:
Example Question #5 : Solving Inequalities
Solve the following inequality for :
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 :
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 ?
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:
or, in interval notation,
Example Question #1 : Writing Inequalities
Solve for :
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
Which of the following inequalities is graphed above?
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 :
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0 is less than 7 so the correct symbol is .
The correct choice is .
Example Question #2081 : Algebra Ii
Solve for .
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 :
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.
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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