Inequalities On The Real Number Line
Bayani Gaba-gaba
An equation pins a value down exactly; an inequality describes a whole range of allowed values instead. From speed limits to budgets, much of the real world is governed by 'at least' and 'no more than' rather than exact equality, and inequalities are the mathematics of those limits.
In this lesson you will represent and interpret inequalities on the real number line, and solve linear inequalities. You will see that solving an inequality is almost the same as solving an equation, with one crucial twist when you multiply or divide by a negative number.
Manufura
- Represent and interpret inequalities on the real number line, and (Extended) solve linear inequalities.
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- Solve 3x + 4 < 19. A. x < 5 B. x > 5 C. x < 7 D. x > 7 Answer: A
- Solve -2x >= 8. A. x >= -4 B. x <= -4 C. x >= 4 D. x <= 4 Answer: B
- On a number line, x > 3 is shown with: A. A filled circle at 3, arrow left B. An open circle at 3, arrow right C. A filled circle at 3, arrow right D. An open circle at 3, arrow left Answer: B
- When do you reverse the inequality sign? A. When adding a negative B. When dividing by a positive C. When multiplying or dividing by a negative D. Never Answer: C
- Solve 2x - 1 <= 5. A. x <= 2 B. x <= 3 C. x >= 3 D. x < 3 Answer: B
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Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Solve Linear Inequalities
Graph inequalities on the number line
"Elementary Algebra: Solve Linear Inequalities" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/elementary-algebra/pages/2-7-solve-linear-inequalities. Access for free at https://openstax.org/books/elementary-algebra/pages/1-introduction
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