Table of contents

0. Review of Algebra4h 16m
1. Equations & Inequalities3h 18m
2. Graphs of Equations43m
3. Functions2h 17m
4. Polynomial Functions1h 44m
5. Rational Functions1h 23m
6. Exponential & Logarithmic Functions2h 28m
7. Systems of Equations & Matrices4h 6m
8. Conic Sections2h 23m
9. Sequences, Series, & Induction1h 19m
10. Combinatorics & Probability1h 45m

0. Review of Algebra

Exponents

College Algebra

0. Review of Algebra

Exponents

1:24 minutes

Problem 90c

Textbook Question

Evaluate each expression. 9*3 - 16/4

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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 common acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) helps remember this order. In the expression 9*3 - 16/4, operations must be performed in the correct order to arrive at the correct answer.

Multiplication and Division

Multiplication and division are fundamental arithmetic operations that are performed from left to right when they appear in an expression. In the given expression, 9*3 is calculated first, followed by 16/4. Understanding how to execute these operations correctly is essential for evaluating expressions accurately.

Subtraction

Subtraction is the operation of finding the difference between two numbers. In the expression 9*3 - 16/4, after calculating the results of the multiplication and division, the final step involves subtracting the result of the division from the result of the multiplication. This concept is crucial for completing the evaluation of the expression.