Problem Solving Involving Inequalities

Problem Solving Involving Inequalities-7
The inequality "" row, to get the right-hand column's value.

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But we need to be a bit more careful (as you will see).

Are you ready to dive into the "real world" of inequalities?

I've tried to provide you with examples that could pertain to your life and come in handy one day.

Think about others ways you might use inequalities in real world problems. Before we look at the examples let's go over some of the rules and key words for solving word problems in Algebra (or any math class).

Because by moving the smaller term, I was able to avoid having a negative coefficient on the variable, and therefore I was able to avoid having to remember to flip the inequality when I divided off that coefficient.

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I find it simpler to work this way; I make fewer errors. Why did I switch the inequality in the last line and put the variable on the left?

Solution Let x = the number of subscriptions Leon sells in the last week of the month.

The total number of subscriptions for the month must be greater than 120, so we write : 85 x ≥ 120.

Solving real-world problems that involve inequalities is very much like solving problems that involve equations.

In order to get a bonus this month, Leon must sell at least 120 newspaper subscriptions.


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