Skip to main content
Ch. R - Algebra Review
Lial - Trigonometry 12th Edition
Lial12th EditionTrigonometryISBN: 9780136552161Not the one you use?Change textbook
Chapter 1, Problem R.2.113

Identify the property illustrated in each statement. Assume all variables represent real numbers. (5x) • (1/5x) = 5 ( x • 1/x )

Verified step by step guidance
1
Observe the given expression: \((5x) \left( \frac{1}{x} \right) = 5 \left( x \cdot \frac{1}{x} \right)\).
Recognize that the expression shows how multiplication distributes over another operation, specifically how a product can be separated or grouped.
Recall the Distributive Property, which states that for all real numbers \(a\), \(b\), and \(c\), \(a(b + c) = ab + ac\). However, here we are dealing with multiplication and division, so consider how multiplication interacts with division.
Notice that multiplying \$5x\( by \(\frac{1}{x}\) can be rewritten as \(5\) times the product of \)x$ and \(\frac{1}{x}\), which is exactly what the right side shows: \(5 \left( x \cdot \frac{1}{x} \right)\).
Conclude that this illustrates the Associative Property of Multiplication, which allows us to regroup factors without changing the product, i.e., \((ab)c = a(bc)\).

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2m
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Distributive Property of Multiplication over Division

This property states that multiplying a product by a fraction is equivalent to multiplying each factor by the fraction separately. In the given expression, (5x) * (1/x) = 5 * (x * 1/x), the multiplication distributes over the division, simplifying the expression.
Recommended video:
7:48
Solving Linear Equations

Simplification of Fractions

Simplifying fractions involves reducing expressions by canceling common factors in the numerator and denominator. Here, x in the numerator and denominator cancels out, which is essential to understand how the expression simplifies to 5.
Recommended video:
4:02
Solving Linear Equations with Fractions

Properties of Real Numbers

Real numbers follow specific algebraic rules such as commutativity, associativity, and distributivity. Recognizing these properties helps in manipulating and simplifying expressions involving variables and constants, as seen in the problem.
Recommended video:
3:31
Introduction to Complex Numbers