Inequality with negative constants

In summary, inequality with negative constants refers to a mathematical expression in which one side contains a negative number or constant. These constants can greatly affect the values and solutions of inequalities, often by flipping the direction of the inequality sign. The main difference between inequalities with and without negative constants is the ease of solving and graphing. To solve an inequality with negative constants, the same rules apply, but the inequality sign must be flipped when dividing or multiplying by a negative constant. Real-life situations that can be represented by this type of inequality include budgeting, profit and loss, and temperature changes.
  • #1
zeion
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Homework Statement



Solve each of the following inequalities; give your answers in interval notation.

i) ax + b < c, where a, b, c are negative constants


Homework Equations





The Attempt at a Solution





ax < c - b
x > c - b / a
because I'm dividing by a negative constant.

x > -b + c / a
 
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  • #2
try rewriting the equation using
A = -a
B = -b
C = -c

then A,B,C are all positive & things shoud be a little clearer
 

FAQ: Inequality with negative constants

What is "Inequality with negative constants"?

Inequality with negative constants refers to a mathematical expression in which one side of the inequality contains a negative number or constant. It is often used to represent a relationship between two quantities, where one quantity is less than the other.

How do negative constants affect inequalities?

Negative constants can greatly impact the values and solutions of inequalities. In general, negative constants will flip the direction of the inequality sign. For example, if the original inequality was "x < 5", adding a negative constant of -2 would make it "x < 3".

What is the difference between "Inequality with negative constants" and "Inequality without negative constants"?

The main difference between these two types of inequalities is the presence or absence of negative constants on one side of the inequality. Inequalities without negative constants are typically easier to solve and graph, as they have a more straightforward solution set.

How can we solve "Inequality with negative constants"?

To solve an inequality with negative constants, we follow the same rules as solving any other inequality. The only difference is that when we divide or multiply both sides by a negative constant, we need to flip the direction of the inequality sign. It is also important to pay attention to the sign of the constant when simplifying the inequality.

What real-life situations can be represented by "Inequality with negative constants"?

Inequalities with negative constants can be used to model various real-life situations, such as budgeting, profit and loss, or temperature changes. For example, if you have a budget of $500 and you spend $50 every day, the inequality "500 - 50x > 0" can represent the number of days (x) you have left before you exceed your budget.

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