Table of contents
- 0. Review of College Algebra4h 43m
- 1. Measuring Angles39m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
0. Review of College Algebra
Solving Linear Equations
2: minutes
Problem 83
Textbook Question
Textbook QuestionEvaluate each expression. See Example 5. 6 • 3 - 12 ÷ 4
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Order of Operations
The order of operations is a set of rules that dictates the sequence in which mathematical operations should be performed to ensure consistent results. The acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)) is commonly used to remember this order. Following these rules is crucial for accurately evaluating expressions.
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Multiplication and Division
Multiplication and division are fundamental arithmetic operations that are performed from left to right in an expression, according to the order of operations. In the expression provided, both operations must be evaluated before any addition or subtraction. Understanding how to correctly apply these operations is essential for solving the expression accurately.
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Subtraction
Subtraction is the operation of finding the difference between two numbers. In the context of the expression, it is the final operation to be performed after evaluating multiplication and division. Recognizing how subtraction interacts with other operations is important for arriving at the correct final result.
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