Algebra and Trigonometry: Structure and Method, Book 2

2000th Edition

ISBN: 9780395977255

Author: MCDOUGAL LITTEL

Publisher: McDougal Littell

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Concept explainers

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.

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Question

Chapter 1.8, Problem 20WE

To determine

To explain:

Variable for representing an unknown number and equation for describing the given situation.

Expert Solution & Answer

Answer to Problem 20WE

Equation for describing the given situation is 2x+12=3x .

Explanation of Solution

Explanations:

Let, X= the number of laps of Mary daily swims.

If lupe swims two fewer laps than Mary, then the number of laps of lupe is (x−2)

If both added seven laps to their daily swims, then the sum of their laps is

(x+7)[(x−2)+7]=2x+12

Combine like terms,

If both added seven laps to their daily swims, then the sum of their laps is 3 times as many as Mary now swim.

Thus, 2x+12=3x

Therefore, the equation is 2x+12=3x

Chapter 1.8, Problem 19WE

Chapter 1.8, Problem 21WE

Chapter 1 Solutions

Algebra and Trigonometry: Structure and Method, Book 2

Ch. 1.1 - Prob. 1OE Ch. 1.1 - Prob. 2OE Ch. 1.1 - Prob. 3OE Ch. 1.1 - Prob. 4OE Ch. 1.1 - Prob. 5OE Ch. 1.1 - Prob. 6OE Ch. 1.1 - Prob. 7OE Ch. 1.1 - Prob. 8OE Ch. 1.1 - Prob. 9OE Ch. 1.1 - Prob. 10OE

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Variable for representing an unknown number and equation for describing the given situation.

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To explain: Variable for representing an unknown number and equation for describing the given situation.

Answer to Problem 20WE

Explanation of Solution

Chapter 1 Solutions

Additional Math Textbook Solutions

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Variable for representing an unknown number and equation for describing the given situation.