Question 82·Easy·Linear Inequalities in One or Two Variables
Which of the following values of satisfies the inequality ?
For one-variable linear inequalities, treat them like equations at first: do the same operation to both sides to isolate the variable, but always remember that multiplying or dividing by a negative number flips the inequality sign. Once you rewrite the inequality in a simple form like or , quickly scan the answer choices and pick the one(s) that satisfy that condition, and if unsure, plug a choice back into the original inequality to verify.
Hints
Isolate the variable step by step
Start with . What operation will remove the from the left side so that is by itself?
Pay attention when dividing by a negative
After you subtract from both sides, you will have an inequality involving . When you divide both sides by , what must you do to the inequality sign?
Use the inequality to test choices
Once you have a condition like or , compare each answer choice to that condition and eliminate any that do not fit.
Desmos Guide
Enter the inequality into Desmos
In Desmos, use in place of . Type 5 - 3x > 11 into an expression line. Desmos will shade the region on the -axis that represents all -values satisfying the inequality.
Compare the shaded region with the choices
Look along the -axis and see which of the values , , , and lie in the shaded region. Any value that is in the shaded region is a solution to the inequality; any value outside is not.
Step-by-step Explanation
Start with the given inequality and move the constant
Write the inequality:
To start isolating , subtract from both sides:
which simplifies to
Solve for t and remember the inequality flip
Now divide both sides by , the coefficient of .
Because you are dividing by a negative number, you must flip the inequality sign:
So all values of that are less than satisfy the inequality.
Check which answer choice fits t < -2
Now compare each option to the condition :
- is not less than (it is equal), so it does not work.
- and are greater than , so they do not work.
- is less than , so it satisfies the inequality.
Therefore, the value of that satisfies is .